For instance, I was once thinking about buying a property that had a minor issue with a relatively easy solution, but then we learned from the City that implementing that solution would create a new problem that would have cost us $50k+ to address in order to retain a certificate of occupancy (I didn't know what I didn't know, but I'm glad I found out before I bought the property!). 

Implement themed experiences like a "Movie Night" with popcorn and streaming access or a "Game Night" with popular board games.

I have implemented a system where I call people 45 minutes before they are scheduled to come view a unit.

You have the rest of your life to implement the learning.I would almost guarantee every investor has lost money at some point in their career. 

DSCR doesn't offer any liability or anonymity protection, other than the fact the loan note itself is a form of asset protection (because there is usually little to none equity in the property to take from the owner).Here are some graphical helpers to assist in the quest of answers on this subject:Asset Protection Decision Diagram - to help assess the need for asset protection, and what to implement : https://www.biggerpockets.com/files/user/CosIorg/file/asset-protection-decision-diagramAsset Protection Onion Diagram - what, when and at what cost one should implement in terms of asset protection - https://www.biggerpockets.com/files/user/CosIorg/file/asset-protection-onion-diagram-v2What is needed for complete asset protection OR the domains that need to be intersected to find asset protection

With rents falling in many areas, and with the cost to buy going up in relation to higher interest rates, this strategy is becoming harder and harder to implement.

Following up on that, I am sharing a few more strategies that we can follow in conjunction with the ones you have listed: Proactive Asset Management: Implement proactive asset management strategies to maintain property value and tenant satisfaction.

You would really need to stick the landing if this risky tactic were to be implemented.

Not sure if that worked or not, so then they tried to implement super strict rental regulations. 

I'd love to know of a system I can implement to teach them