always paying!

I live in a 3 bedroom house with 5 other adults a my 7 yr, my 8 month and my roomates 11 month old. my fiance i and my kids share a room my friend, her fiance and their daughter share a room, then my soon to be BIL and old high school friend share a room. my friend and I are the only ones with steady income, she works and I recieve ssi & ssd we are the ones who pay rent , put food in house, pay bills. things have been getting hard especially now that the onlu car we have between all of us is down. my fiance keeps saying that he needs to find work so he can start providing but today my Brother in law called us and told him of a job that pays cash same day $12 hr and all he has to do is dig holes for new trees to sit in at the nursery, but he doesnt want to do it! Im starting to get frustrated over the whole job thing i go tomorrow for a job interview even knowing that me working is going to kill my body because of my medical condition. am i wrong for feeling like this. i have always happened to be with a man who dont have a job or struggle finding work but this always put a strain on my relationship cause i get angry at his when he turns down work