Congrats on your success so far.Some random thoughts for you:- It might be difficult to tap the equity in the rental at this time given the current state of interest rates. 

It's effective interest is similar to Mezz-debt at current rates but a bit lower.   

Looking at a property that would be a somewhat turnkey STR, it has great numbers and occupancy rates.

Or at least what are investors looking for today as far as return and cap rates?

It offers high accuracy with 80-90%+ correct contact data, which is crucial for reaching homeowners.

Should I use a co-host just to get off the ground on a good foot and rack up some solid 5 star ratings, then transition to self sufficient down the road?   

The reason I ask is because most deals I see on Crexi or Loopnet or anywhere else create negative cash flow under 7 or even 10 year terms with 7% - 8% interest rate.

I looked at the rental trend over the past 10 years, I should be fine in year 7 for the refinance unless rates are totally out of this world.Your right those rents would be really low for Stamford. 

They made contact with me as well but I don't want to get sucked into a scam. 

If rates come down (most likely not in 2025) you can refinance or just shovel cash-flow and pay it down quicker.