Maybe a few hundred an event, but the annual premium is the nasty one.
In 1991 we paid about $850 for an annual retainer, and $106 per autocross. Now inflate that and you can guess how expensive it can be.
Yes, TSCC used to loan equipment. Trailer and all. Usually there was at least one TSCC member who was also a member of the borrowing club, so there was a responsible person.
And I remember a bunch of joint events. Always worked well.
But with any voulenteer organization, its getting people to join in and assume responsibility; to step up and act.
Not just for one weekend either. Do the newsletter/flyers for a year. Run the checking account. Get trophies. But do it for a year. Inject yourself into the club and have the club do things your way. Make changes from within. that's what I did.
As background, I helped run TSCC for several years back in the late 80's. (newsletters, flyers, treasurer, tropies, event organizer, trailer mover. ACTIVELY involved.) I made the club MY club, and was very happy with the way we had it operating. Sure did like those Thursday Nite Thunder events at the Pavilion.....