I have read of problems people have had with more than one
sulcata,especially if they both (very likely) turn out to
be males. They will possibly fight (violently) with each
other stopping at almost nothing to get at each other.
(Ya'll remember Esther that had the two males in NY).
If you have a male/female set, he'll drive her crazy with
his constant attention unless there's huge amounts of space,
maybe that's no guarantee either.
You might luck out and have two females.
I know mine will charge/ram anything he considers a threat
or possible another tortoise and do it very aggresively.
Besides being so difficult to keep anyway, the only thing worse
than one sulcata would be two for many people. I'm not saying
you, but in general, getting two hatchlings is no problem because
sulcata hatchlings aren't any more problem to keep than any other
turtle because they're still small. Being "cute" is what tempts
people into just getting two what the heck. You might have it all
worked out and figured out what you'll do if they're both males
to keep them apart (and unaware of each other) but that's why
I only have one.