I've kept five terrapin species over the years, including Spanish, which are closely related to Reeves'. The main problem with them indoors is keeping the water clean, otherwise they are delightful. A male Florida Cooter and female Red-ear that I had for 15 years were eventually re-homed to someone with more time and space. This was after they had graduated to a six by two feet tank which was a lot of work to keep clean, and the Cooter was the size of a dinner plate. Reeves I believe don't grow so big. The currently very popular Musk Turtles are worth considering, as remaining fairly small. My recent mixed species pair were fed mainly on dog food pellets, ingredients of which were fish and rice. The Cooter especially would eat green food (pond weed, lettuce and watercress) in greater quantities as he matured. Earthworms were a great treat, as was any fresh fish or meat offered. Hope this is of some help. Enjoy your turtles.