How long have you all been involved? That would be the biggest question for me, whether all the dynamics are worked out yet. It can be hard enough to get along with roommates, better not add any tensions into the mix!
Me, 30ish bi female, been doing solo poly for roughly 5 years. Gia, Clay, and Pike, my partners. Davis, ex/friend/"it's complicated." Eric, Gia's husband. Bee, Gia and Eric's toddler.