And the only way it will make sense is if you ran the numbers, the comps and ARV are correct, and you have a fast dispo on the flip and the time frame.I have advanced software for my comps and ARV’s, it also runs my numbers for all costs associated, including holding costs, exit costs, all of it.

I would check and see if this is something your bank offers, or alternatively a lot of PM software has the ability to do it for a small fee too. 

It's a fine business model as long as you don't mind your tenants paying fees for your use of the software. 

Do you have any experience with them or any other landlord pay system/software?

I would give him 24 hour notices for doing showings, halfway through the month he confirmed that he would be out by the last day of the month.I signed on his replacement, got the security deposit and was good to go.

This is an opportunity to confirm they have the expertise you need.

Quote from @Rachael Becknell: I would get something in writing confirming nobody else wants it before you put any effort or money into it.

They had confirmed their first booking within minutes of their STR listing and have not looked back since!

In the past for other rentals I have used software such as rentready which can walk you through the application process for screening tenants.

@Randy Horner It would be awesome if you could stop by their office to confirm that it's a legitimate business!