But I would be missing items necessary for taxes, etc.

I use those as a guide and reference for tenants.That said, I do have some tenants below market rate. 

Hold Harmless & Indemnification clausesAs well as other items.

The Airbnb account they presented as reference had low customer rating.

Highly agree with Nathan - Buildium is a Nightmare to use for STR, it is not appropriate at all and prone to a lot of errors due to the sheer number of manual items that need to be adjusted in there. 

Great thanks @Michael Smythe, in your experience can you itemize the tenants that have the Resident Benefit Package? 

We asked them to address 5 items that we saw as the most expensive and/or critical.

Its referred to as a 1031 improvement exchange.

  $50/sqft for a full interior and functional update, $100/sqft for a full gut down to studs, $150/sqft for newcon .If these numbers make sense I would want to visit the property for a true estimate, where it would be line item work scope development. 

When you're looking for properties to renovate but not not local to check on progress of the project, it's important that you find or get connected with a general contractor that is credible and has references that you can see.