Rental demand has been strong with an asking of $1,700 per month per unit that does not include utilities.

I don't see any reliable apps that focus on handling maintenance requests for small multifamily owners (2-4 units).

That said, I'd recommend focusing on locations with high sales volume as you will have more options to choose from in these locations.So far this year, 240 multifamily properties (2-4 units) have sold in the Bronx - Source OneKeyMLSThe neighborhoods with the most sold properties are:- Wakefield and surrounding North Bronx neighborhoods (31 sold in '24)- Throggs Neck and surrounding Southeast Bronx neighborhoods (31 sold in '24)- Pelham Gardens (30 sold in '24)- Pelham Bay (28 sold in '24)These areas account for 50% of the recent Bronx multifamily sales... focus here to have more options!

I think when you hire a PM you have 3 choices 1)  A very small local provider (<15 units) and they tend to me 1-2 person operations, they are the one unclogging toilets, answering guests, etc and it is tough to do everything, so things lack. 2) A large/nationwide provider where you are only a number and they usually lack local resources 3) A mid size local provider who have resources and you are not just a number.Through effective revenue management with a revenue manager, and being listed on 15+ sites including Marriott Homes & Villas, JetBlue and Allegiant Airlines, Hyatt and Amex Travel (coming soon) we are bringing in more revenue than most can self managing, offsetting our fee.One of the top questions I tell people to ask their manager is the fees, who keeps them? 

I want to create a duplex up unit by combining the second floor and 3rd floor into one unit.

How many units or homes are you managing?

Best of luck.Dimitrius Kiritsis hit it right on the head, if I had to add anything from my experiences, learn what a CAP  rate, NOI ROI is in your, of course you'll need to look at rents for similar size apt units, I say the main thing is knowing how much the property is bringing in and how much is going out.

Photograph or video the empty unit and get the place ready for the next tenant.

We paid for some FB Marketing for leasing up units in our apartment. 

I have been investing in Single Family and am now looking for multi-family 10-30 units.