I have never commented about another users post here before until I read this
I also wonder why you are making this scary plan?
Do you or your twin 26 year olds plan to work while on the road?
I think it is a bad idea.
We have no idea what the circumstances are that lead them to this decision. Maybe they won the lottery, maybe they want to spend time as a family and experience life. Maybe someone has a year to live and they want to get the most out of it. Maybe It was a dream they talked about for years and now they are going to give it a try.
What is scary about the plan, that she is taking her mother? That she is taking her two adult kids? That she is going all in?
It may not be the norm but who are we to say or judge. If its such a bad idea at least explain why so the point has some validity.