I'm sorry that you're having these feelings. It can be so tough sometimes to really see the worth in what we are doing. Trust me, I have been through the wringer and back and I have only been doing this for 6 months. I cry a lot lol but I know why I do this and it makes it all worth while in the end.
You took a nasty hit with these people who left you and ygu had to suffer financially, as well as with your ego. HOWEVER, as you say, you are now pretty much full, you have contracts and full time clients. It can only get better from here.
Reggio, can I ask - what kinds of questions do you ask? I am trying desperately to learn how to properly interview clients, however, I never seem to get a feel for them until a few weeks in when I realize the child is indulged at home and mom is PSYCHO. I am 6 months in, and I have lee-way to now take my time in interviewing people and I really want to find the right families so I don't have to deal with getting psycho mom emails at midnight.