I have tried influencing both through financial advice and business consulting as this child has a business in addition to a W-2.

Best to consult an attorney - these types of things can get complicated and take time to work through - don't want to be in the middle/end of a lending process and have this be unresolved/still pending

I consulted attorneys who are telling me it will be at least a 2 year process to evict in housing court let alone all the protections services available for elderly / appeals he can raise.

Consult with a local eviction attorney on how and what demand to post; most likely a 10-day demand for compliance.2.

I'll rely on their consult regarding the legalities. 

You would benefit to consult with a corporate attorney and CPA in your area before making a decision and to come up with your plan.

My DST's are through Capital Square and they sent me a document that was titled Cost Segregation Studies & More and it was performed by MS Consultants, LLC. 

I had consulted him on an eviction, and he noticed what I was doing and wanted to get in on the action.

For example, I've recently encountered more potential 203K/renovation loan deals, which has led me to actively seek out HUD Consultant contacts.

I recommend you consult with an architect.