You will find your enclosure will be a constant stage of evolving as you go and as you learn what works and doesn't work. We harp on size a lot because most folks think that because tortoises are small, they can make do in small spaces. Actually they do quite a bit of roaming and need as large of a space as possible. Those folks with small areas do well to think about creating another level to their enclosure thus adding more tortoise floor space, but not using up more of the house's space.