in theory there could be criminal background, but I doubt someone would be practicing as a MD with a long rap sheet.Would it be sufficient to merely put a clause in the lease that the authorized occupants are Mr.

This means you don't need the additional expense and administration of an LLC to have checkbook control.

I currently utilize this strategy personally.I have a commercial line of credit that I practice pay check parking with.Pay check parking is the practice of parking all free cash flow that you bring in each month after you've set aside your cash reserves (emergency fund).

More control over expenses, including what would've been a cap ex in MFH becoming a NNN expense that tenant's cover, or at least a percentage of them if leases are properly structured.

I’m currently exploring my options for gaining practical experience over the summer.

I save on property management fees, maintain control over tenant relations, and personally ensure things are done right.

They have psychotic business practices.

I lose control of the investment and these are long term, illiquid investments - but they put significant and regular cash in my bank account and a much higher rate than when I was trying to be actively passive. 

It enables you to take advantage of a smaller, if any, down payment while owning/controlling a piece of real estate.

The problem is government thinks they are better than free market controls.