Is it worth it to own a glider? (EU)

I plan on getting a SPL. I already have a PPL and some stuff.

Do you guys mostly rent? Is it worth it to have your own? How expensive is keeping one flying, and how much does it cost to actually fly?

How often do you attend events? And what is your expirence with renting them from the event organizers?

I would like to fly as much as i can. Any time the weather and winch / tow will let me. I will probably join the local aeroclub and use their equipment.

I am a (powered) aircraft owner... no cost will be surprising to me.