I Agree, like most tortoises they make great lawn mowers.
in the summer time, if your lawn needs trimming, let your tortoise roam supervised over the hole garden, they'll trim it!
When theyre adults you got a reall good lawn mower then!
Like west coast jungle said, their diet is mostly high fiber grasses, which means their diet is so easy!
you can grow all kinds of grass and feed it.

if you wanted, you could convert an indoor enclosure into a grass haven!
Get some grass turf, add about 3 inches of soil under the turf so the grass can grow nicely, and then you plant in other grass and weed seeds and you hang your uv light over the middle, and have just soil under the basking light.
ANd just let it all grow!
Naturally trim it once in awhile, with hatchlings long grass could get caught on them and they could get stuck!

I did this actually for my pair of hermanns tortoises, did great for along time!
i miss it!