I've had a similar journey to yours. Started January 1st 2019, early 30s, had a second kid. Loving every minute of it, though I do wonder when the fun is going to end. Every year I'm surprised the business keeps growing. This year my goal is to diversify to try and ease that gnawing anxiety, but every time I try working on something else I feel guilty about ignoring what's already been working for me. Tempted to just sell so I can have a bigger cushion and less distraction on my next venture, but not sure how the current climate would affect the valuation.