I just started working on a side project that I hope can one day be worth something. I'm also the sole breadwinner of a household with 2 (soon to be 3) kids and a wife depending on me, so it's really inspiring to see that the dream really can happen, even if it takes a decade plus to realize.
Even if my thing never takes off, it's a tool I've wanted for a long time, so I'm motivated to keep going even if it never makes a penny.
Congratulations, wishing you lots of continued success.