however i was just thinking i am on a budget so is it even worth it to get something so small
Well, that certainly is a smaller drive but you could make it work. I do think it is worth it, even if the only thing on the drive is windows. Your system will be much more responsive. I've seen 60GB drives approaching $100, the larger capacity also means typically faster performance. If you can swing it, thats what I would go for.
Anyway, you could do a Win 7 lite installation, but that is a bit of a hassle if you ask me.
Typical install for 64bit is 20GB. Now you can get rid of your page file if you have enough ram, but I moved mine to my data drive. That saved 6 GB. You can save even more by disabling system restore. Then there is the UAC, which I find annoying but others find helpful.
Point is, I got my WIN7 down to about 10gigs so I was able to install a few other apps on my 40gig SSD.
Alot of folks will say that an SSD will perform at its best at 50% capacity, but I run about 3/4 full and haven't had much degradation.
I advise you to get a drive with trim capability.