Wow what BS!

I applied for a job as a pet sitter. If I get it it'll be 12 hours a day. I love animals so spending 12 hours with a little dog would be awesome.
Now for the BS. My step sister when living here only paid $250 a month for rent, she paid nothing else. I'm going to have to pay $500 rent plus electric, gas, water, etc. And still clean their dishes, their messes around the house. She hardly ever lifted a finger. They cleaned up after her. They even said they did. Oh and her boyfriend pretty much lived here. He would be here months at a time. Don't get me wrong I get paying rent then help with the extras. But a 10x8 space is hardly worth $500. There's nearby apartments that for $565 I get a good size apartment water included. All I would have to pay for is electricity and phone. And it's just the fact that my step sister only had to pay half what I'll pay in rent and I'm staying in the same room she stayed in. And she didn't pay for anything else like I will. Here's the kicker. They paid for her cellphone..... Even bigger kicker they still were when she moved out and was for months afterwards. At one point she had two cellphones. I gave mine up cause I wouldn't have been able to afford it. And honestly I don't miss it. And she still constantly calls wanting money. She makes more then they do. And yet they hand it over to her. Not once have I ever asked for money since being here. If I don't have the money for it, I don't buy it. Even if I need it. Here I sit with a kidney stone which needs a doctor. But I don't cause I have no way of paying for it. But she wants a new movie, game, or to go on a shopping spree they just hand over the money. I don't expect or want anyone to pay my way threw life. I don't want them to foot my medical bills. But it's the principal of the whole thing. Why is she getting treated differently then me. Then again she gets treated differently then my other step sister. It's like they put her up on this peddle stole and expects everybody to baby her. And yet they wouldn't ever dream of throwing her out into the streets. But I'm facing being homeless. And constantly hearing about how they can get someone in there for 500. Well, if I get this job (crosses fingers and prays) then they can find someone. As soon as I get first and last months rent, I'm gone. Which with the amount of hours it would be it won't be hard to get that much. And since I'm going to end up with two bank accounts I'll just transfer all extra over to my old one (my bank don't have a branch in this area but I love the bank so I'm pretty much just getting one local just to cash my checks kinda thing). I'll just let them think I'm getting paid less then I am and let them think I don't have my old bank account.
P.S.
Dear God, please help me. I need you once again.