I started my startup when I was 36. Had a four year old and a one year old. To your question - yes it’s possible but how you accomplish it will depend a lot on your situation. For me, I was fortunate enough to have a supporting spouse that had a great job. Our living costs were low enough that she could support our family (albeit with very few luxuries). She did this for a few years while we bootstrapped, and eventually we were successful enough that she ended joining the startup full-time. Five years and 13 employees later we’ve been acquired and are looking forward to the next leg of our professional journey together. This is one of the most difficult things I’ve ever done but also the most rewarding. Good luck to you!