During a trip to VSC in 2007, and having driven all the way from Minnesota, we made a point to visit the Pima museum for an afternoon. I'm really glad I paid the visit, there were some very cool, and extremely rare aircraft there. A few were the only examples ever built. Walking around with that in mind, I was somewhat appalled that more wasn't done by our government to help preserve this great history. More than appalled, I was completely disgusted to see "Columbine" sitting there, buried in bird crap, simply parked and left to rot away.
Pima is not gov't funded. Admissions, large gatherings, and donations that are all that "keep the lights on." My grandfather was in the 98th air refueling squadron, and a buddy of his works there, or at least did at the time that I made my first trip to VSC in 1997. I do believe that some of the employees work there on a volunteer basis.
Tucson is actually one of the best places for it. The thin, dry air preserves aircraft better then any other climate, hence why the USAF "boneyard" is literally across the street.
That being said, a bath to remove the aforementioned bird turds would be nice.