You lose control of the property.

Many of them struggle to relinquish control and delegate tasks to specialists who are better suited for those specific jobs.

I would also be concerned with land rent going up over time, and having no control over that.  

Quote from @Phil Matheney: I would love to know Dave's thoughts on our unique Real Estate program. 

Quote from @Gregory Wilson: This depends on what level of control you can exercise over the W-2 employer.

This method gives you more control and is often a faster way to build wealth.Forcing appreciation allows you to create value rather than waiting and hoping for the market to rise.

You may not occupy your apartment without electric service except during brief interruptions beyond your control.

There are lots of paid software programs that do this for you as well. 

I'm looking to get their "package" which includes a Holding company, LLC Subsidiary​, Corporate Financial Program and an Estate Plan.

Networking through local meetups or REIAs can connect you with experienced investors and potential mentors.With your REITs as a passive foundation, physical properties could give you more leverage and control.