We have a 2 bedroom home...small bedrooms at that. We have one dd and currently have one dfs sharing her room. Not ideal but hes a baby and they had a hard time placing him for whatever reason. We can also have one more baby in our room under 12 months. We originally said only one kiddo at a time but they had such a hard time placing dfs that we said yes to him when we were about to get a newborn placement. So for 3 weeks we had little newbie dfd in our room and dfs in dds room. It wasnt bad because we have a decent sized home and most of the square footage is common areas dining room kitchen living room and sun room/play room and we really only sleep in the bedrooms.
Regulations vary so much but here you need 40 sq ft of bedroom space per child. So unless your rooms are very, very tiny you should be able to fit af few more kiddos in comfortably.