It's a tough spot you are in but hang in there as best you can. Be thankful you have a loving Dad but make sure to sit down and talk with him about what is expected in your new situation.
I'm sorry your daughter is such a miserable git. I have an adult nephew (who unfortunately I live with) that is an ungrateful, immature clod. His sister isn't much better but she moved out.
If you are on disability -are you in the States? I don't think the power co. can shut you off and will work with you on paying down the bill. As to your other expenses talk to them and explain the situation and see what they say.
I am on SSI here in the States and getting paid once a month make it so hard to budget -especially food and other household essentials.
Come visit here and vent when you need to, we don't mind "listening"