The quick short answer in my opinion is this: If you want growth stick to the small multis that you know and once the mortgages are paid off retire fully.

The only issue with seller finance and resale is if they don't want to receive a payoff in short order, then they should include a pre-payment penalty. 

Be mindful of short-term capital gains tax, as profits from flips held for less than a year are taxed as ordinary income, and frequent flipping may result in self-employment taxes.While profits from flips do not qualify for 1031 exchanges (since flips are considered inventory, not investment properties), you can minimize your tax burden by deducting allowable expenses like renovation costs, loan interest, and holding expenses.If you're considering diversifying into rentals, explore opportunities to benefit from long-term tax advantages such as depreciation and lower long-term capital gains rates.

Long story short, all this means a net negative cashflow. 

And also being next to a base Im thinking about short term renting, or Air BNB How did you finance this deal?

Short of selling my entire portfolio, the liquid capital for the down-payment remains unattainable. 

For example, if property values increase rapidly, the owner may feel they gave away too much, while if values drop, investors may feel short-changed.That’s a risk inherent in any long-term financial agreement, but it’s worth noting that the same dynamics apply to traditional real estate deals (e.g., buyers and sellers making decisions based on current interest rates or market conditions).3.

I reached out to Ward Hanigan but that short course does not look available currently.

The property has an amazing creek canyon (attached photo) is 5 miles from all the major attractions to Yosemite, and 7 miles from a lake.

A landlord looks a t how much the property will make long term.A flipper looks at how much in a short term .