Peter Zeihan agrees with you

But you also have to account for where the lines are going to break in The US

Like a high possibility is that the Mississippi river goes on a rampage and takes out all the bridges.
What does America look like if everything goes across in a ferry?

Washington-Oregon Secede and join China... does that help imports from China or hurt?
Does Idaho become an import/export hub?

Somewhere, between Florida and Washington DC a line is going to be drawn
Eastern Communist block to the north, Free Florida block to the south.

So, i would get the group together first, and then choose the spot.
But it still may be better to start and attract people of high ability with cheap homes.