I do first come first served. So if a spot opens up, the first family that contacts me I set up a phone interview with. I do most of the interviewing there and if it doesn't sound like a fit (hours, personality, age of child) I tell them as much and don't invite them for an interview. If it is a match they come for an interview/tour. Sometimes I will have 2 phone interviews in a week and then they both come on the weekend at different times. I offer the spot to the family during the interview if I think it's a match and I tell them I have other interested families and it is first to get the package back to me.