The construction loan portion of the financing will be interest-only. 

When I do that, based on the properties I want to keep I would end up with a net gain even though I would still have capital losses trapped in the portion that I want to keep.Is there any way to hold off paying the capital gains until I sell the remainder of my portfolio that has the losses? 

But the lead portion of it shouldn’t add considerably.

When using your tax returns to calculate your net rental income contribution to the DTI calculation, start with your net taxable rental income, add depreciation, and subtract the portion of your mortgage payment that goes to loan principal reduction.If the final answer is a positive number, that amount is included in your income for DTI purposes. 

For now a sizable portion of it is locked up in a fully paid off brownstone in Boston, but I expect to sell that within a year or so.

When you pay rent with after-tax money, you are again claiming the rental income on the same after-tax money. 2) If you are in partnership with them, they would just pay you half the rent for the use of the half portion of your house.

One thing I would mention that you could do in the future is sell a portion of the property in exchange for the rehab.

My wife and I have decided to move forward and do a combination of things:- Take the larger portion of our proceeds and pay off debt.

Sometimes, especially with a side-by-side duplex in a decent area, the tenants for a 2F can have a little better mindset and can settle in for the long haul more.I think 2Fs will have steadier demand through different market cycles, again because a good portion of their buyers are owner-occupants looking for an in-law apartment, while selling a 3F could be tougher in phases of the market where there are fewer pure investors out there.It also depends on your personal situation.

Or another option is to roll just the profit portion into an opportunity zone fund and then put the rest of the cash on the side.