TLDR; Finding landlords who are interested in arbitrage is a by-product of targeting the right landlords, creating a valuable offering, then putting in the work. - - - - - I have a portfolio of 10 arbitrage units in Phoenix and work with three landlords. 

If you were to refi, I'd consider going with an Interest Only product, increasing cashflow.

Location, location and location, REI is all about the product.

Does this product exist?

. :) We are very competitive our products. 780 score ,25% down DSCR rates 6.875%, 30/30 Interest Only, $5027 IO, if 5 year prepay, No points.

This will be the maximum you can handle before a lenders system will go "ineligible/decline."

REI Blueprint is his company and the name of a different product.

The Census called that “the first statistically significant decline since 2011". 

In fact, AirDNA is so accurate that many lenders will now accept a AirDNA estimate (for non-declining markets) as evidence of sufficient qualifying income on many DSCR (Debt Service Coverage Ratio) loans and mortgages.

In general, developers will model revenue with SAM or an equivalent tool for non-dispatchable production.