What to do when you can't stand your in-laws?

My family of her husband is almost unbearable for me to deal with now. I've been so kind to them too nice, they've constantly taken advantage of me. I have gone above and beyond being nice. He seems never to return favors. My mother asked about ridiculous things that did not pay for their college brothers and was nearly expelled from school I wanted my husband to co sign and that will make payments on the loan, forgotten long before we've had to pay, so do not hit my husbands credit. Not a priority for her. She always asks for money .. or used to finally began to say no, but still asks again and again anytime you need it and still say no sorry, it does not. Occasionally will launch a desirable thing and demand, and if my husband says they will not freak out, either angry or mourn. It's ridiculous .... it happens all the money and then ask us for money, more of us have more bills and have 3 children and my husband just had surgery on the ankle. I used to always borrow my car and I would be fine, but she has a two-seater, so it stays at home. Now she has my lawnmower and weed wacker and my hopes that I come to find that my lawn is more grown up! haha ... the list goes on and then my sister in laws .. Take care of my sister in law's son all the time and my other sister in law is supposed to make every day at 3, but still has plans for what I call last minute to tell me she work is scheduled later or something or have an appointment. She only makes plans without informing me that she is not picked up at 3:00. When I say that not all gang together and question why I can not do this or that for the other ... and when I say they're not what unnappreciative for all I've done. What's the babysitter .... your child every summer for the past 2 years free, driving my sister around the laws, when they had no licenses, providing them with my car, lending them money that we had to learn that just blew theres on shoes or lying . My mother is special to my husband's nephew, she puts him to the movies, fun things to the pool and never take my children anywhere and never offers to support them. My oldest son are both very good at public and independent dressing, feeding cleaning, etc. I can not stand to live near them my family is 3 hours away and is always against us. My mother is the worst. It's almost enough for me to run the other way and change my name! My husband defends them when on certain occasions, when I used to nanny .. she feels sorry for them, but never for me. I do not mind. If not for my children I'd run like hell ... my family is poor, but they do ... load that they're all so easy going, does not ask anything unless its fall to come out.