It seems the company model has changed a little. 

Too bad most REI clubs don't adopt the model embraced by the FIBI clubs in southern California.

The nice thing about the arbitrage business model, is the companies usually pay you a monthly rent, and then they handle all of the AirBNB stuff. 

Never use an Expense Ratio %-  do a line item forecast. 

Well written lease will provide the framework of the procedure.Don't forget AI models are getting better and better at providing information . 

With the above said then develop a scaling model.  

Patio door prices can depend on the Model of Patio door you are looking for, for a standard 60x80 in white it will cost $1900.00 colors can be added, and for a patio door 72x80 the cost will be $2100.00 Outswing for a 60x80 will cost $2600.00 installed, and for an outswing 72x80 it will cost $2700.00 installed outswing with Grills for a 60x80 costs $1860.00, and an outswing 72x80 will cost $2300.00 installed.You also add blinds to all sliding and outswing patio doors for an additional charge.

An option to better understand and see the model without having to spend all the time is turnkey interesting.

Your offer should be based on your DD and modeling the deal following your investment thesis.

AI may get to detailed accuracy someday, but it is a language model today, not intelligence.