It makes a great way for people moving or just staying for a short term period. 

If I recall correctly this is possible, BUT you need to complete the build within the 1031 time period.

Lastly, do you know why they want the 90 day period?

Yes, you need to leave the 10th and eat it but I would just be clear rent is still due on the 1st despite the grace period.

That used to be a big deal, now not so much.....There was a long period where that was not really a consideration yet people continued to prefer separated rooms.And to the extent that energy costs continue to rise it is likely to be relevant again (and actually already is for a lot of people). 

Real estate often appreciates in value over time and tends to perform well during inflationary periods.

Then I have to go for HML, with high interest rates and 12 month repayment period.

Like a property manager if you will not being moving to the area for a long period. 

So in my case, we selected June 1st - June 29th, adjusted the minimum stay to 2 nights for that period, and upped the rent for that period to STR rates. 

Is there a seasoning period?