The gain related to a primary residance portion of the duplex is sheltered via section 121 gain exclusion. 

We plan to buy a single family in a very expensive town - Wellesley in MA and sell our current residence.

: 3 properties in TX acquired before marriage, recent 1031 exchanges on 2 of these properties but kept them in my name in order to keep it simple and not upset the QI, my wife and I have setup a trust and retitled our primary residence but the TX properties are still in my name and not in any trust, all that I've found on the subject (outside of this thread) is to wait 2-3 years after the 1031 so that the TX properties are 'old and cold' and then retitle them into the trust.

When I bought a house about 12 years ago for my primary residence, I probably looked at 300 houses before I purchased one.

I own a home currently and it is my primary residence. 

I saw your site and if we were bigger time investors you would be a good fit.We only have a few single family residences.

Im hoping to get some creative answers on how to overcome this scenario.My scenario is a little unique, as I currently have been renting out my primary residence part time on Airbnb for the last 1 year of 4 months bringing in 3,000 a month conservatively($4,500 this month, which is a record for me).

My question is if I want to use these funds (the cash received = appraisal * 80% minus outstanding loan balance) to purchase property for personal use (primary residence), if that creates a taxable event?

Hi there, wondering if anyone has some thoughts on a best approach here: I am planning on moving, changing jobs and purchasing a duplex (primary residence, rent the other unit out) in the next 4-6 months.

If you must move, sell the current residence, get your equity out and bank it until you find a rental property that makes sense.