I am just guessing but I would say for two reasons...
#1 Space at Chino, although large by most museum standards, is rather "full".
#2 It is ideally placed along a route to one of the most fantastic (I have never see the Grand Canyon myself, but I have heard it is a must see) tourist traps in the world. There would certainly be revenue to be gained by people dropping in to see what the museum is about while on their way to or from the Grand Canyon.
Mike
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Mike R. Henniger
Aviation Enthusiast & Photographer
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