Am I being scammed ?

[Dustin Mathenia]

So I find this deal on FB market place the first house the guy sent me to was a great house but needed 118k in repairs and the numbers weren't there I asked the guy if he had any other properties he sends me to another house in Dallas this house is actually in great shape 155k arv only needs cosmetics windows and new hvac I like it I want to buy it. I find his listing on FB says 75k purchase price ok that's fine look at the kids profile he's 18 maybe 19 he has some post about having a brain tumor asking for money....I tell him I want to buy it here is where it gets weird he says he can owner finance it 90k purchase 15k down $1000 a month 0% interest I've never heard of such a thing but the house would rent for 1300 a month not really cash flowing but it would pay itself off in 6 years so seems like a good deal to me. We go back and forth about the details I tell him I want to do all the paper work through my attorney he says his attorney  has already drawn it up he says he can close today was on a Sunday I told him need to close at a title company he says no we don't since its owner financed 2 questions how do I make sure that this deal is legit and if it's not how can I find the person who actually owns the house...He also offered the first house 0% interest I feel like you would have to own  the house free and clear to do that yes??