Sometimes groups are ok. A pair is almost never ok. They are solitary, territorial animals. Unless you're prepared to have multiple enclosures, stick with one.
Well this just turned into best Saturday ever finishing up outer fence and get a phone call back from the guys who's tortoise I found crossing the road he asked if I would like to have the tortoise back since his kids aren't into it anymore and how excited myself and mine were and how I was gonna get one so I'm happy actually thrilled to say Bailey is back and now I need to make a door tomorrow since we now have a tortoise ahead of schedule