That would almost always be from the same lender who has a 1st AND 2nd on the property and they are just fed up with the owner and are taking the opportunity to get out of a bad situation entirely.Sorry, it's complex enough that it isn't a 15 minute class.

I really would want to stay away from any office properties in depressed or even semi-depressed neighborhoods, especially large ones (like a 13 unit complex).

apartment complexes?

Residential subdivisions, while potentially less complex, can be hit-or-miss depending on local housing trends and the cost of infrastructure development. 

This means you can sell, lease, or pass on the property as you see fit, just like any other property owner.Full Ownership RightsYou have the same rights as a Mexican property owner, including the ability to sell, lease, transfer, or mortgage the propertyLegal SecurityThe Bank Trust is a well-established legal mechanism in Mexico, ensuring your investment is secure and protected under Mexican law.Renewable TermsThe trust is set up for 50 years and can be renewed indefinitely, allowing you and future generations to maintain control over the property.Estate PlanningThe trust makes it easier to pass the property on to heirs, simplifying the inheritance process and reducing potential legal complications.Although the process might initially seem complex, it is entirely managed and supervised by a reputable banking entity.

Should I sell and 1031 the equity into a apartment complex where I can increase my net per month?

There are some rare and complex circumstances where I see this would be beneficial.

Expect a custom ADU to take 9–18 months, with 3–6 months for design and permitting and 6–12 months for construction, depending on complexity and contractor availability, and the speed of processing permits.

Thoughts and suggestions or too complex and take the hit on capital gains tax as I sell my rentals?

More complex than it needs to be, I know, but what else is new when dealing with the City of Chicago...Nicolas, it looks like there is some "spot zoning" within the proximity and the first thing I would recommend would be reaching out to your Alderman.