I realize this topic is pretty old and that I'm brand new here... but you're not alone in feeling trapped.
Sounds to me you cannot just leave your daughter with your mother for a few hours considering you mentioned she was a drunk, and during daycare your daughter got sick often... so you have to find other options, right?
How long does your daughter take naps? I have a little girl too, she is only 9months and will take a good hour or hour and a half nap in the mornings. That's my "me time".
Maybe you can find a babysister for once a week and you and your husband go on a date. My husband and I do that once a month, sometimes we even stay in a hotel over night (my parents take care of my princess instead of a babysister those nights) to keep the passion alive.
Another thing, when your daughter is napping, do your nails, or dye your hair... do something for you and focus on yourself for at least 20minutes a day!
As for making your cash, I make handcrafts and sell them. I don't make much, but it's enough to buy my daughter a sweet new outfit or even pick myself up a pair of shoes. Think outside the box a bit and you'll probably come up with something!
Best of luck!