RE telling the investors here that the 50% rule is a load of crap, so where do you get off telling him his opinion within his profession is out of line?

OT and PT can also prescribe in most states.When you have the documentation, then simply confirm it is from an appropriately licensed profession.

Getting expertise in a relevant profession, such as finance, real estate, or property management, can lead to financial stability and business contacts.

In my opinion, if you enjoy doing it in your free time, make it a profession, and you will not be disappointed. 

Choose the market where you can make the most money in your profession.

The person doesn't have to be a coach by profession but just someone who is experienced and willing to mentor. 

Be careful with mold assessors, some state have no regulation at all for this profession and it is not federal controlled.You might need 2 samples, one in the room with issues if any, another in a different room with no issues and one outside. 

The sad thing is that the barrier of entry to the realty profession is pretty low and there are tons if incompetent agents.

Why would anyone ever quit if the profession is so simple and the pay is so high?

Q4 is relevant for professions other than health care.