Subtract 8% vacacy and assume 35% expenses leaves 28,704 for debt management and cash flow.  35% expenses is typical multi-family but this is only a duplex so add up the expenses as accurately as possible. 28,704/430K (320+100 + closing costs, holding costs) is about a 7% cap rate.  

If we subtract approx 102k that will leave 34k.  

(But note, subtracting the amount of privately borrowed funds, which would have to be refinanced from a different source).https://www.fanniemae.com/content/guide/selling/b2......"

I typically subtract 3%, of the ARV.Realtor Fees: What is the commission you are willing to pay your listing agent (unless you are the listing agent) and the buyer's agent.

I would think that after you subtract paying market rent, utilities, vacancy, etc, it would be tough to clear $15K in NET profit in one month, unless it's a big, baller house, or running it like a hostel with 10+ beds in the house..

I then subtract rehab budget, and subtract my wholesale.  

Take the ARV and subtract your renovation costs.

There are 4 two bedroom units that are for sale so that would give me the potential to have 8 tenants (Pretty obvious).Lets say I went in on full asking price of $450,000 the numbers would look a little something like this:$50,000 dollar down payment (or 11%) so I would obtain a $400,000 dollar loanIf I got a 15 year fixed at 2.59% that would cause my PITI to be around $3,398 a monthThe units could rent out for $1,200 dollar a unit while I also lived in one with a roommateThis would bring my total income to $4,200 NOT including myself (living for free)($1,200 x 3 = $3,600 + 600 (my roommate) = $4,200)After subtracting my months PITI I will be left with $802 dollars for maintenance and capexAfter checking with the zoning laws you are allowed to build on the remaining 6.21 acresThe big kicker with this deal is that the foundation is already poured for the next quadplex to start constructionI have a good relationship with a builder and I know that in the future I would love to build another quadplex on this lotBefore you look at these questions I would like to give you some more information about myself.

Since NOI does not include mortgage interest or depreciation, both of these deductible expenses  are subtracted from NOI to estimate your taxable income. 

NOI is calculated by subtracting the Annual Operating Expenses of taxes, property insurance, maintenance, management fee and utilities from Annual Rents.The DSCR Calculation: The annual NOI is divided by the annual mortgage payment = 1.25+DSCR Example :-Rent Income is $81,000 -Annual Operating Expenses are $16,891 -Net Annual Income is $59,684-Annual Mortgage payment is $35,778.