If you do it over 20 years absolutely it can be done.

But to do that and retire in your early 40's (40-43.33) as you suggest means people will need to likely meet in highschool or early college and work on it right away once they start earning income.

Unless people happen to create a similar plan 20 years prior and are able to find each other many years into their plans. It is possible, but it's harder.

edit: changed the perspective to people, not specifically you.