I can build a mini storage or whatever as long as the zoning is compliant.

For example, I am a little concerned about some aspects of the business cycle recovery and a potential for a double-dip so I lean toward the safest part of capital stack which is debt (or low-debt equity).

I paid 175k for a 400 ft.² one bedroom one bath ADU.

Purchase price: $355,000 3 unit house hack with 2 separate buildings. 3 Bedroom/2 bath, 2 bedroom/2 bath, 1 bed/1 bath.

House hacking in a 4-bedroom here could absolutely work if you run your numbers carefully and stick to those “higher-end lower-end” neighborhoods.

I have received recent quotes for LESTER building around 125k for a 40x80 so I'm doubling that , concrete not included.I feel like i can't loose with this strategy even charging $2 a square triple net for these units ?

There is a stats page on furnishedfinder.com that you can use to see what midterm rentals are asking for in your area, based on bedroom count.

Both units are 2 bedroom and 1 bath.

 - This is not double taxation.  

Double mention on the payment terms, milestones and the SOW/budget so everyone is on the same page and expectations are known and documented.