Hi I have a couple of tax questions.I sold my primary residence last year, where I've both lived and rented out half the house for the last few years.

Looking to refinance my primary residence

Exterior wooden window frames in homes and rentals like this don't really need to be wrapped to minimize maintenance, as I see things, not if you're putting in the kind of modular replacement windows most people put into their residences and rentals.The compelling maintenance reasons to wrap soffits and fascia are still there, replacement windows or no.

It's not that western cultural norms are better or anything like that, but there's about a 99.99% chance that your rental property was built from the ground up to assume western cultural norms would be practiced by residents. 

Although it’s a $17k/year raise, the cost of living is crazy higher.With a 2-year residence in mind, I am eyeing an FHA loan.

I am getting pulled in all kinds of directions with really knowing if I can purchase a 4 unit as my primary residence with a FHA loan and be able to use the rental income as part of my DTI?

First I ask for the landlords where tenant has resided in my application; I go back at least five years, and if that does not get at least two landlords then I ask for a previous landlord.

I have 4 investment properties and bought my primary residence as an REO also. 

You didn't ask but to confirm - yes you can combine sec 121 primary residence exclusion and a 1031 exchange to complete eliminate and defer all tax on gain from the sale - a great strategy. 

I have been selling off free and clear single-family residences and carrying the financing.