It is based on the trust that payment will be made in the future.Why establish business credit?

Knowing your goals will guide your decisions.

On DSCR loan, lenders will qualify you based on short term or long term rents.

Rehab will be paid with my cash. 

I would say the MOST important things are 1) communication with your guests and getting good reviews, along with 2) having a vetted team (handyman, cleaners, etc.). and 3) document EVERYTHING regarding issues and Air BnB will take care of you (without documentation you're out of luck).

Just remember that if you do direct booking and have a cancellation, your credit card processor will keep that 3% fee, unlike Airbnb or Vrbo. 

We will be buying the property site unseen and want someone very thorough that can get to the property relatively quickly after we decide. 

They say that upon the completion of a deal, they will refund your membership fee back to you.

Add a hose and it will drain automatically into a your sump pump or another drain. 

I will have a discussion with my PM to see what kind of experience, if any, they have with renovations.