Just me, but I think an assisted care facility is a very good choice for the adults temporarily. They will have "as needed" care providers who are licensed HHA/CNA's, usually an on-duty RN, nutritionists, occupational and physical therapy, art therapy, visiting dog therapy, usually group outings by mini-bus to venues like a movie or shopping or day trip. It's a safe way for them to begin to explore the new world with as much supervision and help as they need, but no smothering. There are also legal and state financial reasons to do this - there are no parental rights to be terminated, and the state can deem them adults temporarily in need of care and pick up the tab for as long as necessary. There is every reason to believe that these adult survivors were involved in the decision-making process, may have been offered options. That leaves their collected money available for when they can move out on their own, get apartments, etc.
Also the splitting of the 6 minors could be any combo. Maybe the baby is being handled separately, or ones with certain needs are in a group, or the two older ones together and 4 youngest in another home. I trust the authorities have looked at all possible solutions and found the best. It's not permanent, it can be fluid in response to their needs. I was worried all week that any hospital is too much like a prison and too much like their former residence (not a home).
I am certain they will have great freedom to contact one another at will by phone, email, in writing, and in person. I think they could benefit from local volunteer car drivers to help them visit one another? Maybe locations were of importance in the decision so they live in different homes but can literally walk arond the corner to visit each other. PS - Riverside is the 2nd largest land area county in the USA so you wouldn't want some in Temecula and others in Palm Springs.