Stripping methods?
I'm definitely not blasting that whole car. I'm sanding down until I get a good base, hitting it with epoxy and then building on top of that. Yeah it's not the 'right' way to do it but spending 100k on a Duster is not really a good idea either.
It looks like you may already need a floor, lower quarters, trunk extensions and some custom pieces under the rear window made. This is just the rust you know about. Think of all the issues that are going to pop up after blasting that you don't know about? If you can't do rust repair yourself, you're looking at spending a lot of money unless that guy working out of his garage is giving you a sweet deal.