Why do I have to live in Southern California to answer your questions?
I live in Northern California now after 38 years of breathing smoke and enduring the heat of hell.
The answer is, Yes, you can do it for 20-30 years with a decent retirement if you are smart, have lots of energy, have contacts or are willing to develop contacts in the real estate and mortgage industry, are computer litereate and have patience. You also have to invest wisely as there is no retirement program except Social Security and your own investments. You must go to school, find a mentor, work as a slave until you have 2,000 hours of appraisal experience. Then you can get a regular license. If you decide to work on your own, which I think is best, it will take 1 to 3 years to build a practice to the point of having a reliable income.