Hey there! Well, I found out from first hand experience that $300 doesn't get you as far as you'd like...so you're obviously on a tight budget.

Alright, so here's the set up I would recommend...and you can get most of it from RBI

Target/Wal-mart. Plastic tubs are cheap!

You can also get an Acu-Rite digital thermometer, which also reads humidity too! bout 12 bucks

Water bowl

Hides

Then, from Reptile Basics, you can get
http://www.reptilebasics.com/home.php?cat=248
Flexwatt heat tape. This is your heating source, and it MUST be controlled by a thermostat. A good starter t-stat is a Johnson:
http://www.reptilebasics.com/product...cat=250&page=1

You will also need some substrate. Most people use newspaper, however, I use newspaper with a bit of aspen bedding on top...it's all my preference.

That's it...your set up is coming out around ~100

Someone let me know if i've left out something (typing kinda fast )