Here is a video that runs down the basics - https://s-media.nyc.gov/agencies/specialenforcement/01-Legal...There is also a prohibited building list - https://www.nyc.gov/site/specialenforcement/registration-law...Here are some more info overall - https://www.nyc.gov/site/specialenforcement/registration-law..All of this makes STRs in the city pretty tough but it certainly not impossible.

Don't look for lowest rate, look for lowest cost on fees as you will either refinance out of that loan or sell- the prepay will hit you on the back of the head like a cinderblock wall.

That's the direction I'm headed in for analysis.

Keeping your current townhouse rented enables tenants to continue paying down the mortgage while you scale.2.

Are you using the 10% down second home occupancy loan?

My second house was under contract before it was even listed, but the combination of my GC disappearing and having to restart the permitting process for the carport in March right at the start of Corona lock downs dragged that out and eventually feel out of contract.

Figure out a way to narrow it down.

I'll head there next. 

It's not to say I don't get sick and tired of stuff, but if it is worth it, I will continue to bang my head against the wall.

In today’s market most homes will be worth more than their outstanding loan balance unless they are VERY recent purchases with little to no money down.