Silly - I was just asking, I didn't expect you to look into real round trip airfares!
Funny, your 172 is close to what mine is ($98 per hour, wet).
The problem is getting there, getting the time off work, getting a hotel, rental car, meals, getting a dog sitter, etc. I don't think they would let me take even a week off. Oh, well.
It was just me thinking out loud. My plane (the 152) costs less than your plane so the only savings would be the CFI savings at $25 per hour. If I add up the airfare and the hotel and the meals and the (expensive) dog sitter then I may not save anything!
PM me if you move to California.
Kimberly