"Seller financing" or Turn Key sellers

[Richard York]

As a new investor I've been looking at some sites that offer to buy a property for you and sell it back with seller financing. One of the sites marks it up 20-30% and then charges 10% interest on the property for 5 yr term with balloon payment at end of term. At the end, the mark-up plus interest kill any deals that I have. In general, for someone with limited ressources, would any experienced investors see this is an option?

Also have been looking at some of the properties that are turn key and seller financed. Not much room left in them for profit but they can be had for small % down.

What are your thoughts? If you only had a small down payment, would you consider these options?