I have the funding narrowed down and location to start.

It would be a "DSCR" loan in the sense that it would need to debt cover, but not the same formula as the 1-4 units (rent/PITI).

Establish a solid reserve fund (3-6 months of rent) to cover unexpected expenses or vacancies, which are inevitable over time.Make sure you're well-versed in local landlord-tenant laws to avoid legal complications.

In NYC, there's what is called a Letter of No Harassment which must be on record from tenants since often the owner wants to kick out inhabitants to renovate and boost rent and their profit.

Second is partnering with a great lender who can help you navigate including potential rents to help you qualify for more opportunuities.

If you can find a place that cash flows a little, in a solid B location, you're doing great.

Rents are also pretty low there.

Then set the rent accordingly.  

No formula can be accurate across the board because even “cookie cutter” properties next store to each other differ as to view, location to the street, topography of the land, lot size, physical condition of the property, past remodeling, quality of the mechanical systems, sunlight, utility bills, past use, etc.  

Building : 1878 /2008 Renovated.Price : $600000 Asking Total Tenants: 15    & Monthly Rent : $21173Deal Analysis Value Over Time Can you please let me know what else is missing in this to get more accurate deal analysis.