I was (heavily) involved in Meet The Beat - OpenAir Lottstetten. Next to avoiding the maintenance of the website, I'm the origanization's cashier. And one of the transportation gurus.
I joined the team in 2003 and left 2013. I was thrown right into the financial part of the event. Not that I had any expertise in counting bills, it's just what no one else cared to do.
In 2003 we started building the stage. It's a wooden construct architected by ourselves and perfected by a company that actually knew what they were doing. From chopping the trees to raising the beams everything's been done by our team. A mobile lumber mill some tractors and wheel loaders as well as a small crane came in quite handy. And they were lots of fun to operate, too.
Speaking of heavy machinery. That was one of my duties, too. Most transportation requiring a tractor or wheel loaders were my thimg. And yes, I was having lots and lots of fun, even if those machines only go 25 Km/h.
There's more information on the organization and the event on meet-the-beat.net. Understanding German might help you with that website, though.