You could also hit up craig's list. I got a 20g, 2 hides, dual lamp ballast, 3 different temp/humidity readers, 2 water bowls, UTH, and the aquarium wallpaper was still on it for $100. Bought bulbs and substrate and I was set. Usually glass tanks go for $1 a gallon. The reptiles usually a little more. I wouldn't expect to pay more than $40 for a screen top locking lid on CL. I know you said money's tight, sometimes DIY can turn expensive real quick afer a few runs to the hardware store. Don't ask how I know