Yes.
Save everything that could be used to rebuild America.
I would go to the national homeschooling association and order their books, just so you have a basis for rebuilding the education system.
History books and/or encyclopedias from 1945 to 1950. Be sure they mention that conservatives were the last hold outs against the Nazis. After that, leftist authors and professors proclaimed the Nazis were the right wing, when they were really the left.
Look in antique stores, yard sales, flea markets, library book sales and your local dump.
Book stores will be expensive, but worth it for some.
I don’t think America can be rebuilt. The people are different now and they will be more different when the end comes.
You are correct though, there will be no more free elections. 2016 got by the deamoncraps and they won’t let that happen again.