The 'solution' is easy, be happy with what you have and stop buying crap you don't need. The fact you think you need a 'extra' $100,000 on top of a job and a house(mortgaged or not) is a good indication the issue here is you just want stuff.

The answer to your question though is work hard and ignore your kids. Get a promotion by skilling up then move to a high paid job.

Or start a online company, sell something but make the site also make people want to come back, as before work your but off, know your product inside out, stopping wasting time on the little things.