No, it sounds outrageous. Do it yourself. It's so easy. Buy a valve stem adapter from Gemplers or Tractor Supply, buy some antifreeze (amount depends on how low temps are there), and use a cheap 12V pump or some other pump, and fill it. I did mine using 3 gallons antifreeze on each tire and water and labor are free.
Now there are higher tech solutions like rimguard or washer fluid, but unless I was in an area of deep freezes, water and antifreeze work just fine. And why pay someone to do something you can do yourself. I would also be really sad if I paid hundreds of dollars per tire and had a flat and lost it all.
And why load the fronts? Most do just the rears.