When you're making financial planning for retirement, ask yourself how you imagine the type of lifestyle you want in retirement. If you're retiring at an early age, you may still want to have a very active life that may be too demanding at an older age
If you retire early and possibly still have young children that need you as a parent, that's totally different compared to having children that are adults themselves. In that case, you're not bound to the location and time of the year when you want to explore the world on a trip.
Young children living at home may cost a fortune, especially if they're going to college. This may seriously limit your other options. That is of course totally fine, but you have to think these things through.
Do you want to start a new business that's completely different from your previous line of work, then don't count that income. It's very uncertain, and if you don't like it, after all, you want to be able to quit.