Cold_Gambler, flight schools often want a turn-key system. This is very much NOT a turn-key system.

I suspect that there are enough seriously hard-core simmers out there that would want this kind of thing - you figure there's enough of them out there to support a number of companies that make kilo-buck and above hardware for homebuilt heavy jet sims.
Keep in mind that a collimated display is very much a "pro-am" kind of thing. If you're happy with a desktop rig or have to beg SWMBO for square feet, you're NOT going to want a collimated display. It's no different a commitment than something like rebuilding and racing cars - it's not for everyone and it's time, money and space intensive.
BTW, for those that have no clue what we're talking about, head over to
http://www.diy-cockpits.org/coll to see construction pics & videos (more at
http://www.youtube.com/f15sim) of the world's first (and so far, only) DIY collimated flight simulator display.
g.