NC but some may recognise my story as I've posted about it before...
BIL (24 yo) lives at home with MIL. He's in 6k worth of debt through taking out pay day loans whilst unemployed to pay for gambling and holidays with his GF.
A temprary job opportunity came up near us (1.5 hours away) and he asked if he could come to stay with us during the week and return home each weekend to see his GF. We agreed on the basis he pay his way here and that we don't ferry him around.
We're 7 weeks in and he wants to quit. He hasn't paid us for over two weeks despite promise to, instead he's been giving his gf money for driving lessons. He promised to pay us what he owes tomorrow before he goes home for the weekend.
This morning he hasn't gone to work, he's sneaked off home, leaving his dirty washing on the kitchen floor expecting me to wash it ready for next week 
He obviously has no intention of paying us tomorrow and isn't taking this job seriously.
We've tried our best to help him sort his debt out. Giving him options he can take, signposting to different charities. But he just doesn't care.
AIBU to refuse to have him back Sunday night?