A real estate appraiser license sets you up to remain an EMPLOYEE who works to make someone else rich and to support the poverty class.
That is, unless you use that license in your own real estate dealings, to be able to ascertain valuations and all the little things you would otherwise pay another appraiser to do.
The money in real estate lies in buying undervalued properties, and turning them into sources of cash flow (ie: rent). My grandfather made a fortune in section 8 housing, which for the uninitiated=welfare apartments. He was a big-time realtor and specialized in farms also.
If you are not ready to jump into buying properties, there is another investment goldmine in real estate that barely anyone even knows about: tax liens and tax deeds. Do your due diligence on general tax lien investing, then study the rules specific to your state. In my state, only institutional investors (ie: banks, etc.) are allowed to buy tax liens, so I'd have to go out of state to get into it.
Basically, you buy a tax lien by paying the outstanding taxes on a property, and the property owner has X amount of time to pay you back the principal + the interest rate determined at the auction. And if they don't pay you on time, you take possession of the property. So it's really a safe, guaranteed investment system. But you have to educate yourself, and save up money to get started.
Some books you should read are Rich Dad Poor Dad, Cashflow Quadrant, Think and Grow Rich, The Law of Success.