Affordable beds/ couch sofa bed

Hi everyone, recently my daughter has been having a tough time with her father and I reconnecting, she’s young but we’ve been spending more time together and in the night she ALWAYS wants to sleep with us. We both don’t mind it’s just her fathers bed is so small, so like last night in the night he slept on the floor because we’re so uncomfortable.

Anyone know of good affordable beds/ or sofa beds? He swears he has a queen but when it’s him and I we fit perfect. Or any suggestions, on what to do? We don’t have a lot of money, we stay at his parents house. We want to start saving to move out which is why we’re not looking to spend so much money thank you