Yes;  you are well solvent and servicing the loan perfectly well.  

Way faster than waiting for solvent and glue to dry on CPVC.

If you've got one, maybe two, folks involved in the estate, OF/LO can be an attractive option if all heirs are currently solvent and don't really NEED a lump sum of cash.  

Having to put 20% will keep a lot of investors solvent in down times.  

I doubt by the time we retire they would even be solvent. 

It's not owning the property.Hope your seller remains solvent and not sued so his property doesn't get a new lien against it while you're making all those principal payments.  

There are 13 private Home Owners Insurance companies in Florida and none of them are Solvent.

FHA is solvent.

As I cannot offer ideas to you about how good or solvent the RE market is in the areas you suggest, I would mention that a different approach you can take is to use BP to search the membership for investors, agents, brokers, attorneys and other RE professional in the target area, and then pose your same question to them.Another thing to try is to just go onto one of the RE online sites (like Zillow), search the area, find a local realtor and cold call them.  

If the estate is not solvent then he gets no fees.