Don't see the big deal. Try out the different films, decide which you like and stock pile as much as you are comfortable with. Then as you use the film replenish as needed. If you find you aren't using the film in a reasonable amount of time sell off any excess. If they stop manufacturing the film then you will probably be more carefully about what you shoot with it.
Just spent a grand on sheet film, 5x7, WP, and 8x10 and I can tell you that's not much film. So 5-10 grand doesn't sound unreasonable to me.
Didn't Michael Smith have a walk-in freezer installed to store film and paper in? He might be someone to talk to about long term storage of film.