Hello, I am looking for advise on the proper steps to purchase an upcoming foreclosure estate property from the executor. 

Itll cost about 1500$ to install.

Also make sure they have proper license and insurance and name you as additional insured for liability.

Let me guess - you never verified if they are a licensed PMC or if they have proper insurance.Do they even have a website with an Owner's & Tenant's portal?

Without proper permits, there’s a chance the city may request you to revert any non-compliant additions (like the extra bathroom) to align with code standards.When it comes to refinancing, banks tend to look closely at the property’s legal compliance.

Currently landlord pays for all utilities, is a system/product/device that can be installed to the water meter that tracks the usage of water through each unit so I would be able to bill the tenants separately?

Like you said, put the proper protections in place but know that you can still lose your money - unless you are in first position.

If you decide on installing cameras then just like at your home it is a matter of brand preference and styles, etc. 

who can you recommend as a flooring installer?

I've installed vinyl plank flooring in a rental, I really like it but it keeps separating (I helped install this with someone who has installed alot of flooring previously but never the vinyl plank type, so maybe we did something incorrectly).