At 22:17 30 May 2011, John Cochrane wrote:

The owner of the tug obviously wants to keep his investment in gliders
and instructors working. Your post says this is is a commercial
operation, not a club or a charity, so the answer seems clear:
Business class. If you, mr. private glider, want a tow Right Now,
thereby idling my investment in a training glider, instructor, and
lowering my throughput of students, go for it, that will be $80. If
you want to pay $40, wait until the students rentals and rides are
done. Now everybody's happy.

Well, you can't ever make everybody happy. But this is
certainly a wonderful solution, and at least answers
everybody's objections. (And you know what - there
would be a certain number of folks willing to pay the $80.)

Jim Beckman