I bought land with the seller carrying back the mortgage (Arizona), it worked well and is really the most likely way to be able to sell it.
A. It was not on a "contract for Deed" As you dont get title with a contract for deed, but the seller usually can foreclose much quicker.
B. The seller should get a very substantial (at least 20%) down payment. Interest should be at least 2 points greater than current long term financing available on a conventional house, maybe 6.5 % these days.
C. If you get a deal like this and the land is payed of in 7-10 years with interest and the buyer begins putting more of thier own money into the land via building and infrastructure whats to lose? Worst case is you have the cash down payment, and get their improvements and the land all back to you can sell it again. Of course what some people think are improvements others consider garbage.
If the buyer defaults foreclosure will follow the normal process in your state which may be 5 months to eventually get a judgement. But once again if they have alot of skin in the game via a large down payment and their own money in building and infrastructure then they are less likely to default.
Make sure it is all done through a title company at a minimum. And study up for yourself on foreclosures through contract for deed and normal mortgage holder foreclosure