My clients and I use subcontractors who have been vetted by the firm and who we have a long-term/on-going relationship.

Hey @Eric Greenberg, this is an ongoing rehab my investor is currently working on.

This must be ongoing war.

They usually use 75% of your total reported income — 25% is subtracted to account for potential vacancies and ongoing maintenance." 

It's easy to obtain, costs very little, and doesn't require additional, on-going effort to maintain.

I decided to turn the property into a duplex so I refinanced for 420k and the gross rent is expected to be around 10k a month for the rental ( work is still ongoing ) .

I agree with your point somewhat, except for the fact these were my first 2 STR's and the mansion provided revenue that fueled the early stages of our still ongoing business (so IMO still providing a return) and also the lessons learned were invaluable. 

I gave up on going to South Beach 20 years ago when they started charging for parking.

To me, this would require multiple touch points, both in person and other on-going touch points such as calls and emails. 

Could be wrong but I believe the monthly allocation is simply a way of accounting for the cash we will need to set aside on average to pay for ongoing maintenance, repairs, etc.