If you have a petsmart near you the have a small 2.5 gallon tank for about 14.00. It does not take up alot of room and it has a lid. I have one for Hershey and he is doing great in it. I have a small heater I got at Walmart for I think around 15.00 and a small filter that was around 10.00 also from Walmart. He loves his hidding place I have in there for him. Here is a picture so you can see what I mean:

you can see the heater in the corner the filter is not in this picture but here it is so you know what it looks like: