How much does it cost to have a specialist stick a ballon in your nose and inflate it?
I don't know.
This is a new procedure!
You can look up ENT's that are trained and certified to do it here... (unfortunately there are no ENT's near me yet that do it)
http://www.acclarent.com
Probably very little.
However, if you want to make sure the balloon is in the right spot and not next to your optic nerve or a major cranial vessel, I'd suggest you pay a decent price for someone who can do it safely.
Like most things in life, the fee isn't for what you do; it's for knowing how to do it right - the first time.