Multi unit interest advise

[Jeff A Barnes]

I found a 9 unit, with 2) 3 bedroom and 7) 2 bedroom units listed at 599,000. Annual income is 70,320 with net operating at 53,171. It's in a nice area, low crime, 3 units recently updated and not rented. Others nice but outdated units and are 40 years old. Rents vary but listed at around 6,020 monthly. I tried Bp calculator but not doing something right I'm afraid.

Listing has renters paying all utilities, owner pays maintenance 2,000 taxes 2232 and insurance 2232.

Is it doable? Thanks BP family