Dave's plan is to destroy everything at the start of the kingdom. All cities, houses, businesses, etc will be wiped off the earth. People will apparently live under their fig trees till they rebuild their homes in the design Dave approves.
Oh, and every so often I need to remember to say this, don’t I? Day 1, there better be a plan, because…You go in and just blow up everything man does…You just stand back and throw the biggest hand grenade you can…it is going to blow it all up. They’ll be ready to follow you, but what are you going to do—right now—on all of this at the same time?