This is exactly how I fill my wallet (but am in competition with quite a few entities that already exist in the UK). I even try to add one more dimension to the equation of trying to prevent the system going boom based on symptoms already being presented e.g. flickering lights etc.
Experience is the key issue. Having an alphabet soup (lovely expression, 10/10!) after your name actually doesn't cut the mustard at all (it may help a little, but has not got a patch on "been there, done that, got the T-shirt").
Being able to absorb information and then being to take it away with you (in your head), sleeping on it, and coming up with a solution is my best tool. Strangely, I leave maths for the classroom, it only confuses the matter in most cases.
For me, I suppose it all started when I took train sets apart at four years of age to see how they worked (I was not popular with my parents when I did this sort of thing!).