Since they usually keep crews fully employed, the have better control over their labor costs.

I dont think its income govmit is regulating .. its tenant/owner relationships and rules and regs related to tenancy. there is rent control though in some markets so that has been around for a very long time in places like NYC and Berkley SF etc.

Actually, sometimes not only the GP but any other major players.

It would look good on your paper and would look "better" when you introduce yourself to future clients that you have million things to back up your real estate license, but certainly don't need it. with real estate, you have to have good communication skills, understanding situation and how to handle it(problem solving), know how to control your stress, learn how to take care of clients under stress, analyzing, CALCULATION (like mentioned on thousands of bp podcasts) and network well. 

The smart county and cities have tight controls in place so developers can't throw up cheap junky looking boxes with shoddy design that clutters the overall look and landscape for a city or county. 

Unless you invest via an LLC owned by the IRA, you will not have checkbook control over the funds which means you need to run transactions (e.g. income, expenses, etc.) through the trust company who will need time to process the transactions and generally charge fees for each transaction.

Team Player, Operation Professional, Business Owner, Wisdom....

In the investing world it's important to take controlled steps.

My legs, arms, hands, my ability to breathe, bowel control, and even had a stroke from cutting the vertebral artery.

No way to control that with self-showing, unless you're stopping by the property after every self-showing and even then there are still issues.