I'm thinking that if ever I get to become a foster parent, I may not get involved in daycare at all, or if I keep the daycare it will be only on part-time basis (depending on the age(s) and numbers of my foster children. I'd like to be able to fully concentrate on the foster children.
Having other children to play/socialize with is one very attractive benefit of providing daycare not to mention that daycare would provide some income.