Looking back at some of your older posts it seems that you have had a history of people taking advantage of you and I was wondering if you have a contract? Is this something you are doing as a business or for extra money? I ask this as you mention another job. I think if you took some time to write up a contract and list of policies and took a deposit from families and had them sign your contract they would stick with the rules more and your business would run much better. In addition always take fees in advance. There are lots of members who can help you with this process.