so we live in mid PA and we would like to get a tortoise or a pair. and we plan on keeping them indoors year round in a homemade enclosure. and i was wondering. before i start building the enclosure what is a good size and what are good plants and such for it? will it work if i build a giant box and put soil and plant grass and plants in it? how high do the sides need to be and what kinds of plants/grasses are good for them? i was thinking of planting grass so they could graze. any advise is much appreciated