Hi Latindiva
Here are my views on this.
Once you become a serious judge, it will be hard for you to ever compete again, because you will be 'one of the judges' in the eyes of the competitors and you will be seen as having an advantage.
Also, think of this: If your federation is trying to promote dancing and competitions, the last thing i would have thought they'd need is one of their good dancers giving up competing. You don't have a partner at the moment, but you may have in a year or two. I'm sure everyone here sincerely hopes it's sooner than that.
You can encourage youngsters in schools or whatever by being a trained teacher and using your competition dancing knowledge in that way.
God forbid you would ever have to stop dancing through injury. But if you did, THEN be a judge.