buy in bulk, sell on land contract with high interest

[Jesse Hopcus]

Hello, this may be the new plan.  Buy a bulk of foreclosures in the Midwest.  Like 75k for like 15 properties, they are usually like 5 k each.  I then seller finance them on a land contract.  From what I estimate 15k each.  10 to 20 percent down with an 8 percent interest rate?  Sounds good, has anyone done this,  any advise.  I would feel more confident if I knew someone that was doing this could give me some advise!! Thank you