I’ve seen several three unit buildings in weehawken recently converted.

Hiring a contractor to assist with repairs and a property management company to manage rental.

Even if I am to not be taking home the lion's share of initial deals, I'd like to still be building some capital for future dealings.

My previous renters were relocations - either had sold their home and looking to buy another (low inventory so takes a while to find a home to buy) or moving here from another city and didn't know yet what neighborhood they want to be in, or alse building a home and need a place to live until it's completed.

You are working a demanding corporate job but also want to build rentals on the side.

You don't have to be a contractor but it will save you a good chunk of money. 

As a licensed contractor, I can provide insights to make sure you’re getting the best value and quality for your project.

@Polat CaglayanI've never seen a formula but here is a general rule of thumb for multifamily:The class of an apartment refers to the quality of the building, which can be determined by a number of factors, including age, location, and condition: Class A: These are the highest quality apartments, typically built within the last 15 years.

I will have a contractor do most of the work from now on Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?

I'm currently adding all of my numbers for a 20-unit apartment building in for a test, and then I'll bring my other 90+ units.