I started a project and was paid 50% to start and we agreed both on writing and messages that the other 50% would be due when project was done . This was done with the homeowners. We finished the project and the contractor said he needed couple weeks to pay us because he was broke. He gave us $3,000 of the remaining $8,250 we are owed, it’s been 2 days since that happened, he didn’t give us a receipt or paper with how much left he owes us , the homeowners apologized and said the other half was the contractors responsibility, so we are in a bind . I have workers to pay and can not wait . Can I sue both the homeowners and contractor? Or just the contractor.