The cool thing about the smaller tort species like the greeks and russians is you can get away with smaller caging. Also consider simpler caging. The great thing about torts is they dont jump or climb as well as snakes or lizards. You can make a simple four sided frame about 1.5 feet high and attach to plywood bottom. A simple lip around the top using four to six inch wide wood strips should keep them from climing out. Four x two foot rubber maid tubs work well too.

Good luck with your decision.