Points I can roll into the cost and don't mind a buy down if necessary.My primary concern is the bleed rate monthly for the build, Airbnb stabilization and the year after while we season it and prep for final financing for long term hold.

My spouse was the primary decision-maker, and I’m unsure whether to keep my share, sell, or hire a property manager.For those who’ve faced similar situations, what worked best for you?

If you buy primary you only exclude $750k loan interest if you itemize deductions instead of taking standard.

I am renting two units (1 basement and 1 side unit) in my primary residence.

You could do something like what you want if it was your personal primary residence and even then the interest rate would be ugly. 

You're likely better off attending your local REI meet-up to see if you can find an investor who has house-hacked or is currently house-hacking their primary home.

Can still use the $250k primary residence deduction per spouse on capital gains.  

I double checked and these layouts do have two exit doors for both primary and the next gen suite as well.

After they moved in, we started to get some mild complains from our neighbors (for the rented unit which was our primary residence until we moved out in another house a few miles away). 1.

I always loved having an HELOC on my primary residence as the answer for me.