Getting my house back after it has been rented?

Ok, so here is the scoop...we moved to AZ, and we didn't want to sell out home, so we rented it instead. 2 days before the family was supposed to move in my husband got this sick feeling in his stomach that told him not to do it, and to wait another month, but the leasing agent kept pushing him to just rent it now, and that he might not find a renter again, so he did, against his gut instinct not to. About 7 days later, we found out we have to move back, and this family is now there. We have a severely autistic child who has already been traumatized by the move to AZ, and now we just want him to be able to back to his home that he knows, and is comfortable with, and is set up for him specifically, including the pool for his water therapy. In all fairness, my husbands buisness partner knew he was out of money 2 weeks prior to him signing the lease, but didn't tell him about it because he thought it might turn around somehow, but it didn't. Do I go and fight for my house back...or let it go, get a rental and further upset my already very traumatized and confused child.?? They are not even paying what we wanted for rent...this was the leasing agents dumb idea, my husband wanted to wait, but she kept pushing.