If there's any way you can do this, I really recommend finding a 10 gallon pot, and installing a valve and thermometer in it, and investing in a propane burner. If you shop Ebay you could probably get those things for about $150. The reason I say this is because this hobby really has a way of getting out of control, and if you start with the bare minimum such as a 3 gallon pot for partial boils, etc you are soon going to be unsatisfied with your equipment, and will wish you had started with better stuff. Also with the large pot, when you want to make the move from extract kits (which I definitely recommend starting off with) to all grain brewing, you will already have the kettle you need.