To make things even more complicated for you but also to make certain you realize the weight of this I will add that our current residence is under a conventional loan.

I don't want to complicate it, but if you saved the net cash flow every month, plus an additional $140, you'd have enough money to pay off the loan at the end of the 5 years.

It's complicated and will be controlled by local law.  

I paid $1950 for my 2019 tax returns preparation, which I think is more complicated than your situation--joint filing with my wife, did returns in 2 different states--had 3 properties in MA and one of was sold in 2019, and 5 properties in GA.

To further complicate the matters, they have something called "gateway cities" which have incomes that are generally higher than regular ones.

Without knowing how complicated the beneficiary sign off process will be what contingencies would you rely on in your contract to protect your earnest funds? 

The 1031 execution isn't that complicated. 

You have to have a 2 year history for conventional financing.FHA regularly goes to 50% debt ratio (and above for a file that's manually underwritten)The appraisal process for FHA is no more complicated for a conventional loan.Interest rates move daily and FHA and conventional are compatible. 

Lastly, ask a lender if there's any complications with financing that property. 

It can be kind of complicated to understand but like JFK said (paraphrasing) "we don't do things because they are easy, we do them because they are hard."