All the plans in the world, but not the capital to at least start things.
I've been looking over land prices nearby - I am living on a small acreage, but something larger would suffice, particularly for building an underground shelter. Above could be any number of things - I have been thinking crossbow & archery course, small training facility, a few other things spring to mind.
A lot that could be self-sustaining, but it's the initial purchase of land - and I'd want at least 40 acres, preferably 100, to do it on - and that takes money.
Any wildly rich people interested in funding for their own survival?