Good Lord. Tell me again. What is it exactly that husband does to help out around the house and with the kids? I must have missed it. And you're doing all this for HIS daughter and he charges easy child 1 $20 to use a welder? I don't think so.
I'd take the bill or whatever you have from the tutoring place and give it to husband's parents and tell them that while you and your mother are interested in helping easy child 2 that they need to pay for it. You'll get her there. But they need to cough up some money.
Honestly, I'd have gone postal on those people a long time ago. I don't know how you do it. You are a better woman than I.
(((hugs)))