Can I offer buyer a rent to own agreement?

[Marc Valencia]

My cousin is selling our family home. I currently live here. I dont have the capital to buy it. The real estate agent just walked the house with an investor. If I went to the investor and said "hey, I'll pay you $x amount per month to keep living here with the intention of buying it later" would that be an attractive offer? If yes, how much should I offer? 

The house is in extreme disrepair and they wouldnt be able to rent it to anyone else in its current state. 

The most common scenario around here is to buy SFR, knock it down, and build a multi-family.