I would definitely factor in some substantial capex/ maintenance and repair costs which could lower your returns.  

I still think this is just like factoring accounts receivable .

One thing to add is that when you buy a new build, your PITI will likely not be factoring in the correct state tax number.

@Damon AlbersI hate the alphabet rating system because it is such an arbitrary thing that boils down many important factors to one letter. 

See, when building a portfolio, appreciation is key, and the #1 factor that will dictate things.

@Theresa Amouzou A lot of factors go into finding good deals.

I'm not a typical Realtor perse looking for clients so I don't need the trust factor that may go with the REALTOR symbol in my marketing or anything.

I've included an example below to help illustrate this.So different lenders have different rates (which do vary even for DSCR loans) but these are factors they all consider.See example below:DSCR < 1Principal + Interest = $1,700Taxes = $350, Insurance = $100, Association Dues = $50Total PITIA = $2200Rent = $2000DSCR = Rent/PITIA = 2000/2200 = 0.91Since the DSCR is 0.91, we know the expenses are greater than the income of the property.DSCR >1Principal + Interest = $1,500Taxes = $250, Insurance = $100, Association Dues = $25Total PITIA = $1875 Rent = $2300DSCR = Rent/PITIA = 2300/1875 = 1.23If a purchase, you also generally need reserves / savings to show you have 3-6 month payments of PITIA (principal / interest (mortgage payment), property taxes and insurance and HOA (if applicable).

They focus on safety issues, such as wood rot, water damage, and structural integrity of balconies and decks.

When considering refinancing, also factor in the closing costs of the new mortgage to determine if it actually helps you.