Refinance a few months later and let the tenants pay to build the next and repeat.  

If a client repeatedly uses me or a closing was particularly easy, I'll drop my fees.

The whole concept of unjust enrichment would not be affected by joint ownership of a property anyways.

It is an old building and she constantly complains about the sounds and doors slamming and it affects her health.

Depending on how the entire line is run may affect your options, particularly if the store line is closest to the city/septic connection, and one or more of the other units merge into it.You might investigate the liner option, unless this has already been shot down by the findings of the camera inspection.

And hopefully repeat the process for a few times.

This may affect value or time required to sell.7) Adding an ADU does not make the property a duplex.

MARKET UPDATE - DECEMBER 2022As volatile interest rates and inflation continues to affect housing affordability, buyers and sellers are becoming creative in their efforts to buy and sell real estate.

You need to enter for safety/health issues that could affect other tenants. 

Show the owner how the repairs you are going to need to make and the money you are going to spend on your end and how its going to affect your goals.