I am an appraiser in Houston and most areas a typical 400-500 sf quarters adds ~25k to most neighborhoods and the really nice ones in higher price point neighborhoods add somewhere between $40k-$75k.at the end of the day, the appraiser will likely do their best to bracket the adu as an additional amenity with another similar comps with an adu or find another with similar amenities.

It's the worst or best (depending on your strategy) boom and bust real estate market in the world.The explosion of the last bubble during the financial crisis was much worse than the US, with some properties losing three quarters of their values.

(This is often done on a monthly or quarterly basis) Syndications are often 5-7 year commitments, so it is important to know going in that you will have access to the sponsor if you have any questions or concerns about your investment.

Then add an office and living quarter to the Storage location to live at. 

Hasn't anyone dumped the quarters on a table and wrapped them in the $10 papers and counted that? 

If it is available, they are usually updated quarterly.

My current thought is to write up the partnership where I offer the partner/investor an annual return on his $ with payments made quarterly until the full payment w/ interest is returned.

Complete Campus with caretaker quarters, etc What made you interested in investing in this type of deal?

Then boil that down to a 1 year goal and then down to a four 90 day sprints or quarters of action.

Quarterly strategy meetings or more frequently if needed.