Veiled have their own special beauty, but it's nothing like the colors Panthers can produce. Panthers are generally put right behind veileds for "new owners". They tend to be a tad pricier, which might be a factor. Try to buy a captive bred chameleon if possible (or at least captive born). That will take out a few early health concerns.
I don't know of any reason the chinchillas should bother the chameleon.
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And, Welcome!