Then when you are 55, you can sell each home as a completely free and clear home (of course, before tax considerations) and use the proceeds as your retirement income for the subsequent 30 years.

General terms (so far) are $750 k offer price with 15-20% down; our broker believes the land is worth about $500 k, the tax records list the property valued at $60 k (we know it worth quite a bit more than that based on some recent comparable sales.)So a couple initial questions are; has anyone ever used owner financing as a tool to acquire a property and then subsequently worked with a more traditional lender to refinance (shortly)thereafter?

Subsequently I've received an offer from a buyer who wants to buy it as-is. 

Can returns be too high that investors set their expectations too high for any subsequent deal to meet? 

No SP# and subsequently no file available to view at the courthouse.

I can always use subsequent rental income to replenish the cap-ex "fund" and it's unlikely that I'm going to have a roof failure AND 3 HVAC units completely die out AND have to resurface the shared parking all in the same month. 

For BRRRR, you still look at deals like a Flipper would, except your end-user is a Tenant instead of an Owner-Occupier, so accordingly, you rehab differently.If you don't reckon that you can value-add sufficiently so that you're all-in for less than 80% of a Lender's subsequent ARV appraisal (in order to qualify to get all your deposit back again), then, have you really found the right "deal"? 

Attributing the success you have had with digital marketing and subsequently asserting that lists do not work, is a classic example of misunderstanding 'correlation' and 'causation'.

Subsequently negotiated a $20k credit at closing for repairs the inspections dicovered.

Can you amend your taxes to show a profit (and pay the subsequent extra tax)?