Is it possible to get a more traditional loan with fixed interest for 20-30 years?

I'm planning on moving out of my primary residence in a few months. 

I created my own letter template and started send letters in 5x7 Manila envelopes versus the traditional white envelopes.

An individual (like a person who just wants a better return on their money in a CD, 401K, etc...) may have the same terms as a traditional hard money lender but I've found they have more flexibility. 

I've been very fortunate enough to be able to buy a house as a primary residence every time I move to a new duty location...except for my last duty station.

If it were me, and I did when I left my last job 16 years ago, I'd transfer my old 401 to a traditional IRA. 

@Michael Harris , if primary purpose of this is tax avoidance, it is not permitable. 

My primary goal was for the tenant side of my personal duplex to pay the mortgage and then some. 

I own a SFR that used to be my primary but has been rented for 2 years now.

I am reading a Robert Irwin book which suggests buying a home every 1-2 years as your primary residence, and renting out the previous residences as investments.