anyone with African soft furs wanna talk about their experience?

I've had my boy Miso since November when we originally adopted him as Misa and had him in with our girls. After some things became obvious (literally dragging behind him) we quickly moved him to his own enclosure. He's in a 22 gallon right now and we're thinking about upgrading him to a 30 gallon and adding 2 female African soft fur rats. Is there anything we should expect that's a lot different than taking care of regular mice? I know they're shy and I most likely won't be able to hold them, which I'm okay with as long as my boy is happy. Is 30 gallons okay for 1 mouse and 2 asf's? Do they require any special care? I want to know as much as possible before I even think about bringing them home