rental lease

we were in the process of buying a home, this was a private home sale, explained to seller that we needed about two months to get our credit were it needed to be, seller said we could move into said home and rent the two months until score was up,. I gave our current landlords a notice die to this, with sellers permission I moved items in, there was a paper stating what we were in charge of as tenents and what he was in charge of as landlord, after a few days he called and said that he was having second thoughts about renting to us for the two months due to the fact that if we didnt get a loan to buy then we would have to move again, I tried to take back my notice to current landlords but they sent a letter stating that the house is under new contract with another couple , called seller/landlord back and explained this situation to him, he stated that we could move in and rent. then instead of sending us a lease agrement he sent a purchuse agrement now he will not let us move in states he wants to sell not rent  and we need to be out of our current home by july 3rd. does the paper that stated what our responsiblilites and his responisbilties hold up as a lease contract, and do we have leagal rights to move into this home???? I have personal belongins in home due to him telling me I could?

Laymans take:

Did he give you the keys to move your stuff in?

This one may come down to details of state law as well as the  written paper you mention--exactly what does it say? It may well be sufficient to constitute a lease and that fact the he appapently gave you access to the unit may well constitute possession under said lease.  Did you also give him some money? Sure would help if you had done so. Your version suggests you reached a meeting of the minds --the basis for a contract---its a deal--that he now has cold feet should not be relevant.

I see LL's point of what happens if you fail to do the purchase in 2 months--but it seems late to me to now raise it....

You may need to take a hard line--move in and force him to try to evict.

Hope that written  piece of paper cuts it as a lease!