Let's say you can make $250/door just to pick an arbitrary descent number - which would make rent $1,367/month.Your 1 paid off house has all the other expenses but P&I.  

Basically the bill just gets stuck on the other homeowners account with interest accruing and at some point in time they try to sell or refinance the unit and it needs to be paid off. 

Now let's say I raise rents to $750, and in doing so I get two months of vacancy and some turnover expenses.

Look at the deal, the leverage, the risk and everything about the deal, then think "what is the risk of this going good or going bad, and what should I be paid for that risk".

If court early, they can be very expensive to fix.Hope this helps

I took out a mortgage through the builders lending company DHI Mortgage but have since paid it off in full with the proceeds from the sale of my home in Maryland last year.How did you add value to the deal?

I'm getting paid more, but I have a lot less time.

From there it's point and click categorizing and tagging of income/expenses to their respective properties. 

We own a single family house on the same road, just 4 blocks away in this same form district that is on pace to earn us $35,000 after expenses in 2024, so am confident this duplex would perform well also.

My total hard money payment was 12k and I was talking in a bit more than 20k but my other expenses were high.