I own a DG 100
Glider $15,000
Insurance $800/yr
Storage $30/month
Annual $100/yr
Property taxes: $300/yr (varies greatly depending on where you live)

Knock on wood but I've owned it for almost 4 years and have had zero maintenance costs.

So, owning your own glider is a CHEAP way to fly. DON'T hesitate to buy a glider, DO hesitate to buy an expensive glider because it costs more at every level. Further, when the gelcoat starts cracking on your newer glider, its value will be significantly impacted. Buy something with 30:1 that is glass (even in poor shape) and 15 meters. That's all you need to get a Gold badge and then some.
DG 100
ASW 15
ASW 19
Russia AC4
LS-1

Pilots win contests with these gliders, you can too!