Re: Thinking of getting training certification.
I got mine from ISSA. Actually I'm still taking the class. Look at the gyms near you and see which ones they take. ISSA seems to be recognized by everyone. I worked at Golds Gym which let me start before my cert was done but id get a pay raise once it completed. Working at a gym helps get you started and helps build a clientele. Doing it independently is where you make more money. It's also a good way to supplement income too.
There is no hunting like the hunting of man, and those who have hunted armed men long enough and liked it, never care for anything else thereafter.