High Interest Private loan worth it?

[Meg K.]

I decided to seek out private lenders because the bank deal was not working out. The Lending Club interest i got is 18%...for 3 years ...is this worth it for a duplex house with 2 BD each selling for 28k? It appears all the rental income, if paid monthly, would go to paying back the loan for the full 3 years. The upside is that after 3 years I would not have a loan on the house. The area is not great but i did not see any vacant houses on that street. The seller does not want to go through agents or bank. Seller says roof needs replacement. I do not have a lot of cash for "surprises"

Any feedback?

THanks, Meg