Another thing about gliding - building time will take ages, and you have to like standing around in fields waiting. It's a labour intensive activity, with everyone helping out with launches etc, and because it's a club environment, people tend to be pleasant and polite and disorganised and no one is prepared to crack the whip. You might build more time if you spend that day working an actual job, then spend the money on flying. I know a guy who worked part time at a flight school on the desk in return for flight time. A good way to get a got in the for as an instructor.