WOW there's just so much to say about them. If you want a baby you'll have to build a nice indoor home for it so that it can live inside for a few years, then it will have to have an outdoor enclosure because by the time they're around 20-25 lbs, they can knock down dry wall inside the house.
They're grassland tortoises so either a nice large organic lawn to graze or orchard grass hay should be about 70% of the diet, they should have spineless cactus in the diet, greens such as dandelions & other nonpoisonous weeds, no lettuce, no pellets, no junk food & no fruit.
Because we adopted ours at a larger size & had to house her outdoors, I bought 3 Peterson's Field Guides on poisonous plants, medicinal plants, wild flowers & found that I had 2 weeds growing in my yard that I had to yank out because they were poisonous.
The best thing to do since you're researching first is read through these links that explain just about everything you need to know about housing, feeding, everything:
http://www.sulcstatn.addr.com/index.html
http://www.anapsid.org/sulcata.html
Good for you for researching this first, they are a huge responsibility. Easy to care for once you have everything set but getting that done took us quite a lot of time & money. :-x
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PHRatz