I have to tell you, mites are VERY serious.
I bought a baby ball from a pet shop { bad mistake I know }, and she was infested with mites. I treated her every few days with the spray they sell.
We had to leave town for a week, and when we returned the mites were so bad, I removed her hide and climbing branch, so I could treat her and her tank again. I left the branch out overnight, and apparently that is where the mites were hiding at night because the next morning she was dead in the bottom of her tank and positively crawling with mites, you could see them moving over her poor little body.
This was the dead of winter, so her tank promptly went outside to freeze everything in it, and for a wonder my other snakes never got them.
But yes, given the right circumstances, mites are very dangerous. If you have any small mom & pop type pet shops nearby, they might be willing to order PAM for you. Just a thought.
Gale