@Kenny Bao typically I’ve found my work in connecting in off market deals 100+ units has left me spinning my tires.  

Most operators post on multiple STR OTAshttps://www.biggerpockets.com/airbnb-calculatorGood luck

Depends on the operating agreement and docs you signed.

Im a medium sized operator - 46 units- and my typical deal has an ARV from 200 to 230 when its finished.

These documents include your operating agreement/ corporate bylaws, articles of organization, certificate of standing, and the EIN letter. 

We shall see but it may all be just typical yap yap.

Once it is operating, it doesn't require a ton of time, save & except when you have an emergency come up.

There are also additional costs of operating and maintaining an LLC, like separate bank accounts, annual report filings, tax filings, etc.2.

I would look at the DSCR loan as the first option.By the way, I suspect you are going to be disappointed by any refi appraisals   ADUs typically appraise poorly   JADUs can lower the property value Vs having the space as part of the primary unit.  

We can still choose how much to pay someone to operate it if necessary.