Re: Does anyone have the personal training certificate?
By far and away, the best way to get information on certification is to talk to managers at recreational centers, gyms, and hospitals in your local area. You might also do some research on the state level if you want to ensure that any certification is accredited, which might matter when looking for employment.
If you are wanting to be an independent contractor, as realspeed mentioned, then all the more reason you will need to consult local experts on how to proceed.
I admire you for thinking outside the box when it comes to finding employment, but since most of us are out of the US or your state, we probably have very little input that would be pertinent to your particular situation, or that you should take as gospel. Even internet articles aren't going to apply to every country, state, or community.
Get out there and good luck!