Aside from the income considerations, I wouldn't offer flexible care like this because it will be much harder for the child to adjust and take a lot longer, especially if the days are not regular. I have two part-timers sharing a space right now and although they are regular, I find that one of them gives me a hard time at nap-time because she doesn't nap at home and also she sometimes cries for her mom even though I had her for a year full-time before she went part-time. I don't think I will do part-time care again for this reason. Just my two cents worth!