My husband used to be my backup in case of appointments but is no longer able to help out do to a new position at work.

I do my very best to schedule outside of my work hours but sometimes I don't have a choice.

I do not use any kind of replacement.

I simply close for part of the day or the whole day.

All the parents in my care have plenty of flexibility.

I am with an agency so I can't just use my neighbors, a friend etc.
It must be someone who has had training,first aid, background check etc.

I could hire a replacement who meets all that criteria but I don't like the idea of a complete stranger in my home,with my kids and with the kids I am responsible for KWIM?