Most of them seem to..
Save up lots of money.
Wait for kids to go away either by age or divorce.
Buy and setup bike.
Sell the house or take share in house sale.
Realize after a few months that this doesn't cost that much and is fun.
Keep going.
Eventually return home and decide to do it all again OR go back to the grind.
Sort of assumes there is not much at home to be missed doesn't it?
Some do it together, some do it alone some make a living out of it.
Cheers
Graham