You need to develop a Scope Of Work that is precise and then start getting prices for all the work.Once you have that magic number, then you will add that to the cost you pay for the house, along with any other fees or expenses...Then look at finished Comps (get a Realtor like @Chris Ayars said) and see if you will make any money......

There is no precise formula by which properties are placed into classes, but here is a breakdown of the most common classes, A, B and C:Class AThese properties represent the highest quality buildings in their market and area.

It seems like interest rates are most common, so that’s what I’m leaning towards, but is the ball in my court regarding the terms or in the investor’s?

If your intent is to sell your rental(s) and leave the RE asset class then I suppose the # years of cashflow metric might be more applicable, but I think it heavily relies on the assumption that you've accurately timed the top of the market which requires a crystal ball and sorcery above my pay grade.

That's precisely the void we're aiming to fill.

I bought at precisely the right time for cash and it cash flowed beautifully.

AIRDNA has it's place, but it's no crystal ball. 

Looking for some insight if I should wait to purchase in the hopes of more multifamily properties becoming available in the future, if I should make an extremely low ball offer on what's currently listed.

Moved down to San Antonio from NYC over the Labor Day Weekend (continue to manage a modest portfolio in upstate NY) and hope to get the ball rolling down here.

Also, try contacting a local appraiser or tax advisor who could provide a precise adjusted cost basis for your capital gains calculation.