Yes, I plan to.

They say their plan is to hold the properties for 5-7 years3. 

Currently, I am planning to build single-family homes on those lots.Keep this business simple and focused on your niche.

If this is a lousy plan , which step should I change? 

I'm planning on moving forward with their latest deal, would be great to hear your experience.  

Essentially all of the planning, permitting and projections ready to prepare the project for development and then sell the property with the additional 12 unit entitlement to a more seasoned or experienced developer.

We are planning on using someone local to make sure all applicable laws and regulations are followed as we understand this is not a generic transaction.

Beyond that, if you plan on your properties to be property managed, you will be paying 10% of your gross income to the property manager.  

I am planning and preparing so I can purchase a 4-plex in a little over a year, just want to know if any of you have some YouTuber recommendations outside of BP. 

There are over 20 active CPAs here in these forum assisting RE investors with their tax planning and strategies across multiple States.