For example, if you have no experience in land development - that is extremely complex and risky compared to owning NNN rentals. 

Your current numbers make no sense (600K property at 70% is 180K down and 420K financed, but four 300K properties at 95% is 60K down and 1.14M financed).The odds of finding someone to loan 95% on four investment properties is extremely slim.

He has millions of dollars invested in his property and must be extremely careful that he doesnt't rent it to a person who is a crazy failure.

Rental property is extremely tax advantaged based on the current tax code.

As a negative, it also has the largest gap between the cost to buy versus the cost to rent, making cash flow extremely difficult without committing more equity up front.

When it rains or hails a metal roof that's is open to the living area is extremely loud.

Finding the leak, obviously, is vital to knowing the fix.

For me it's CA since I live here but the prices are extremely high for a new investor.

I don't expect a swift recovery from Trump, without some extreme pain.

If you ask anyone in this business, note servicing is the Achilles heel and it is extremely difficult starting one from scratch.