for my primary internet..my question is if I buy it I would need to have WIFI on my desktop so could someone recommend a good inexpensive wifi adapter for my PC, keep in mind that I dont have internet so The device would have to work out of the box or with the included drivers on the disk it came with..
It looks like your desired hotspot supports 802.11b, 802.11g or 802.11n. So as long as whatever wireless adapter you pick has one of those (I would go with g or n) it will work.
There are tons of choices out there. I suggest going to www.newegg.com and searching through their wireless adapters. You can filter your search by price, 802.11g or n, interface (PCI, PCI-E, usb...), or other options.