Looking for a case to buy under 150$ that can support 2 graphics card easily

There are actually a lot. Can you provide additional details as to limit the vast range of choices:

1) What specific graphic cards are you using (to verify the length clearance)?
2) Do you need a Windowed-version or non-Windowed panel?
3) Do you need 5.25" exterior drive bays? Will you be installing Blu-Ray or DVD Drives? Fan Controllers?
4) What is the actual size/footprint of the space where you will be putting this case (under the desk? atop? any clearances?)?
5) What is your motherboard size (ATX? mATX? EATX?)?
6) How many storage devices will you be using? 2.5" SSD? 3.5" HDD?
7) Will you be installing custom water cooling loop? Pump?
8) Are you using an air or liquid CPU Cooler? Kindly specify the brand/model for Height Clearance and Rad mounting locations.
9) Do you prefer a case with built-in RGB lighting/single-color lighting or not?
10) What color scheme do you wish for the case? All-black? Black with accents? White? Gray?
11) Are you concerned with the weight of the chassis and its material?

Based on your requirements, here are some cases I would suggest (note that some of these are not technically "full tower" as you have preferred. However, those cases will still fit in your components easily with good airflow and cable management):

Corsair Carbide Air 740 ($149.99 B&H / Best Buy)
Detailed Review: http://www.tweaktown.com/reviews/7856/corsair-carbide-air-740-high-airflow-pc-cube-case-review/index.html

Sample Build:


Phanteks Enthoo Pro M Tempered Glass ($105 Newegg)
Detailed Review: https://www.bit-tech.net/hardware/cases/2016/10/25/phanteks-enthoo-pro-m-tempered-glass-review/1

Sample Build:


Phanteks Enthoo Luxe Tempered Glass ($125 Newegg)
Detailed Review: http://www.technologyx.com/featured/phanteks-luxe-tempered-glass-review/

Sample Build:


Corsair Obsidian 750D ($150 B&H / Best Buy)
Detailed Review: https://www.techpowerup.com/reviews/Corsair/Obsidian_750D/

Sample Build:

You're welcome!

I think it's meant for custom-loop water cooling builders out there (not me). The case is really ENORMOUS. More often than not, if you don't have those water cooling components yet (such as the large reservoir and those hardline tubes), you'd be scratching your head how to fill up those large voids left after installing the basic components with not much hard drives. But if you DO plan to go water cooling, then that case fits you well (as seen in one of the sample builds I linked). I wished the 750D had included a PSU shroud (which IMO makes the interior look cleaner/less-cluttered). I also wished it had support for 360mm/480mm at the front panel intake (especially if you plan to water cool your 2 GPUs). The only triple-size rad it can mount is 360mm at top exhaust. It does support some double rad 240mm at the bottom and front (but you have to eliminate all the HDD Drive Cages).

No problem! It's really hard to choose a case objectively for someone else, as differences in a lot of factors between two users would come into play. Among the 4 cases I suggested, I would say:

Corsair Carbide Air 740
If you aim for "compactness" but able to fit in a lot of components. Best airflow IMO out of all the cases. Can fit a LOT of fans. PSU and drives are nicely tucked away at the other side. It's a cube case, so the dimensions are shorter but wider. Easy to open side panel is a plus. Not recommended for custom-water loops with reservoirs/pumps (only for AIOs though). Can fit a 360mm-rad up front (but only double-rads on top and bottom).

Phanteks Enthoo Pro M Tempered Glass
PSU shroud is a big plus that also tucks away the HDD cages. The upper chamber is a nice large space to fit in a future custom-water loop but at the same time doesn't feel too much void (compared with the 750D) if you decide not to. Good airflow as well. ODD cage can be removed to fit in a 360mm-rad up front. Fits also a 360mm-rad up top. Great cable management (with included velcro cable straps).

Phanteks Enthoo Luxe Tempered Glass
Only one among the 4 that has built-in RGB lighting at the case's sides (with extension cable inside to plug in a compatible RGB strip, purchased separately). More restricted "viewable" space due to the vertical shroud hiding the HDD drive cages and the ODD bays. Therefore, less space to mount reservoir (might be forced to select a very small diameter (~50mm or less) reservoir if mounting at the far end of the GPU (where the res bracket is located). PSU shroud is good (for "cleanliness"), but kinda defeats the idea of having a bottom intake fans (for airflow). Great top-mounting fan design (can fit a push/pull config with the topmost fans mounted between the top panel and the actual case and the rad+bottom fans mounted inside the case). Great cable management similar to the Enthoo Pro M. Includes a fan hub at the cable management side.

Corsair Obsidian 750D
As I previously mentioned, ideal if you are really serious in custom-loop water cooling systems. Very enormous case. No PSU shroud is a downside.

Personally, I'd go 1) Phanteks Enthoo Pro M; 2) Phanteks Enthoo Luxe; 3) Corsair Carbide Air 740; 4) Corsair Obsidian 750D (only if I am sure about custom water cooling), in that order.

NZXT HUE+
The NZXT Hue+ is a great addition to any build. I have that in my PC now. It was a bit buggy at first (especially during the updating of CAM software versions) but have stabilized and had no problems so far. CAM monitoring is also useful as aside from controlling the RGB lighting colors and effects, it also provides general information about my system (CPU/GPU/RAM use, temperature, etc.). The RGB LED Strips are +5V though, so, you can't use them with other +12V headers or strips. The NZXT Hue+ Advanced Lighting comes with 4 included LED Strips (it can accommodate a total of 8 strips). I bought the Extension Kit (which comes only with 2 additional LED Strips) to expand the Hue+.

This is still ne of the best cases made.
https://www.newegg.com/Product/Product.aspx?Item=N82E16811854003
You really don't even need a Full tower case.
For light kits you can buy full sets.
https://www.newegg.com/Product/Product.aspx?Item=N82E16811854003

Thermaltake Core V71 Power Cover Edition actually gets pretty good reviews

maybe not better

but possibly as good

would have to read some reviews on them and see which suits you best

the cover/shroud is just to hide cables and make the build look tidier/nicer

sounds good

the hue+ is pretty great as the software lets you change colour of every single led if you want to

got one here though not got it installed at the moment