You bring your hell with you...

Once again, I am in the position of having to start looking for somewhere else to move to with no money or resources to get me there. I have debts up the wazzoo, and no way to pay them off. I just had the cable installed, and there is a penalty for not paying it, but I think that I can take it with me.
My mother cannot come home expecting me to do all of this for her. I will do the cooking, the shopping, the laundry, and most of the other household duties, but I draw the line at helping her to dress and bathe and lifting her up when she can't do it for herself, which is all the time, because I cannot do these things.
I am just not physically up to the task. My back is already in agony just from carrying around the junk necessary to register my car; just from standing and sitting and such at the registry. Just from 4 hours or so of that I had to rest for a day and a half.
How am I to carry on here? If I manage to get us relocated, I'm pretty sure that my family is through with me, because they won't get why I'm not bending over backwards to "take care" of my mother, but I just can't. If all she was asking me for was to do the cooking and cleaning and run errands, no problem, but actually carrying her around the house?
After 6 weeks of physical therapy, she should be doing better than this, and if she isn't it is partially due to her not wanting to.
My younger brother just thinks that they will automatically take the house away, but I'm not sure about that. I think that he just stopped talking with them and decided that it was enough and let them take it. He doesn't understand that just accepting that is putting me out on the street and that is a bad thing.
And holding it over me that I won't have a place to live if I don't break my already broken back taking care of her when she won't put effort into taking care of herself is really not okay of him.