None of those people want to move frequently, I think families tend to move more because they become pressed to as kids outgrow certain things in the area (school, sports, friends) or new kids are added to the mix. 

So I don't have experience with FHA, because I'm not an FHA buyer, but my partners' end buyers frequently are.

What follows is a specific example:New contract-for-deed legislation passed in the last session of the Minnesota Legislature empowers consumers to make more informed home purchase decisions, requiring disclosures by certain “serial” contract-for-deed sellers and amending the injunction statute as regards cancellation of contracts for deed.The 2013 Minnesota legislature has passed a new contract-for-deed disclosure statute applicable to sellers who frequently sell residential real estate on contracts for deed.

This is on a SF, of course I would hope it would never be that frequent and some I could possible handle myself but I want to be conservative with my estimates to ensure positive cash flow.  

BTW, the OP's question was the most frequently asked question here on BP, thus the reason for the sticky topics ...

My husband and I are frequent visitors and hope to do some investing there in the future. 

Several of these folks post frequently on BP, but a local company is Gossett Jones.  

I haven't tried using "Rehab, Duplex etc" because I think those terms are used too frequently to be of any value to me.

@Andy Collins Glad you survived what could have been a serious injury.I was just reading an article about Disability Insurance for the self-employed & apparently some of the more frequent claims are from rental home owners. 

I am also a social media/inbound marketing person so I am on most social media sites very frequently.