NFPA 72 outlines locations, batteries are for backup, many AHJ's require 10 year batteries. 

The estoppel certificate outlines any agreements between tenant and landlord.

The issue I’ve found when analyzing LTR properties with BP Rental property and Rent calculator is my cashflow is negative (I’m using calculations based on numbers outlined in the BP Rental property webinar). 

It will at least give you an outline of what to look for.

I have a separate addendum for pets as part of the lease agreement which outlines pet waste pick up requirements and a hold harmless agreement which cover personal and property damages on behalf of the dog and its owners responsibility.

Here are my thoughts based on your outlined steps, with a focus on the U.S. aspects of your plan:1.

@Bob Asad, Bill outlines it pretty well.  

Check the Lease Terms: Ensure the lease clearly outlines responsibilities and terms.Background Check: Verify the renter's legitimacy and experience with short-term rentals.Insurance: Ensure your insurance covers short-term rentals.Local Regulations: Verify local regulations for short-term rentals to avoid legal issues.Exit Strategy: Understand what happens if they terminate the lease early.

This will usually be an excel sheet, or maybe something fancier, that will outline, item by item, everything that needs to be done, parsing out every item, labor, materials, etc. 

@Christine Okamoto, Greg has provided a great outline of what a passive investor is, which is what it sounds like your father wants to be.