Keep things as organized as possible too, so you don't miss anything and that will help create a system for future deals, making it easier each time. 

There are many buildings with systems reaching the end of their life - Galvanized hot water risers, leaking vent stacks, aging window systems, outdated elevator and fire safety equipment.

They will have systems in place for finding off-market deals for you to analyse where the numbers are more attractive.

It’s interesting you list security systems … is there a type you recommend?

Flipping system?

Hi - Any large property managers (50+ STRs) who manage properties for other owners, what is your most preferred PMS? What are its pros and cons for you?

Finding systems that optimize your time and efficiency with your rentals makes a big difference.  

They setup to assist clients from all over the US and have great online/mobile banking system so you don't even need to go to a branch for your banking needs.

Adding teams/schools that aren't in a competitive system.

When I look up this question on internet, it always says that in NYC, its the tenant who pays ...but in reality I am told that about half of Brooklyn listings are no fee (meaning that landlord pays) in order to get it rented fast.