Re: Re-wire the entire house?
I would say rewire if it hasn't been done since it was built. Modern wiring is needed to bring it to code which will no doubt be required to get service in the new location, Plus the possible addition of grounds, and circuit of adequate size for modern living. Re plumbing may also be needed especially if it was left unheated with any water in the lines or if it is old galvanized piping.
Rewiring and insulation can be done without a full gut and I prefer plaster walls over drywall.
Be sure you live your life, because you are a long time dead.-Scottish Proverb