My job isn't permanent, but it's not going away anytime soon either.

These are generally not up to code and will fail FHA/VA/USDA appraisals, and possibly others.The reason is that the permanent steel lally columns are filled with cement. 

I would like to get better "Owner Occupied" terms for the mortgage (FHA 3.5% or Physician Home Loan 5% Down) rather than 20%-25% down conventional investment property terms.Can I put the property in my name and make it my permanent address and primary residence and then live with my wife in her rental, while AirBnB out my unit?

You got the home while others were scared off by rates AND you get the rate you want on a permanent basis.

In addition, it's part of the permanent record of the tenant(s). 

If it doesn't generate fat piles of excess cash you don't buy. 

The market conditions that made demand soar (Covid and Christmas) are not permanent factors.

The city has granted flexibility in either renting the lots to RVs on a monthly basis or placing MHs on the lots for a more permanent usage.  

If I did my calculations correctly, I am looking at a 3% cap rate and a big fat 0 cash on cash return. 

Streets must either be devoted to public use and maintenance, or private streets protected by permanent recorded Easements.The remaining economic life, as determined by the appraisal, must be greater than or equal to the term of the proposed mortgage.