Is this something you should add into your property analysis as revenue you won't be taking home, or do people use Airbnb service fees to account for that extra amount?

Basically an informal audit of ones portfolio.This could be as simple as creating a few benchmarks (specific ratio of expenses, total PM fee ratios, vacancy rates and duration,etc)As much as one could assume they have a well oiled portfolio, an outside investor could find areas of improvement.

Then I was blocked because I can apparently only start 10 conversations per day.

A quick Google search shows a price of $30 - $50 per sq.ft. but I don't know if that includes the land, permits, utilities, and other incidentals. 

I immediately sent out certified mail and raised the rent by $200-300 per unit.

We used to underwrite $650-$750 per unit annually but that was a few years ago. 

.: @James WiseI think part of the issue is that, per 2016 Brandon Turner, every property cash flows $250 a month forever, and so there's no such thing as a $5K turnover I've had rental properties for 14 years and never even had a $1000 turnover You've got rentals going 14 years that you've never replaced the flooring?

My experience is that condo associations typically charge so much in monthly HOA fees that any potential investment income gets eaten up by that fee.

However, with our current low interest rate and rental rates for our neighborhood we could also cash flow appropriately $1000 per month, keep it and allow for further appreciation over the next three years until we would need to sell to capture section 121 tax exclusion.

There are individual investors who might lend privately, but not banks or hand money lenders per se.