[ysavir]

Of course, then it also falls to her and her team to handle permits, hiring employees for the concert (and this would be a one time thing for those employees?), training, arranging materials, foods, and anything else, figure out parking and transportation, manage any necessary insurance, and whatever else is needed.

A venue is more than having a place, it's having everything necessary to handle an immense volume of people gathering, acting, and dispersing from a single location in a safe and orderly fashion.

[xarope]

Cirque du Soleil does this. They always setup their own venue on an open ground, but I think that's more for consistency of their layout and apparatus.

[amanaplanacanal]

They used to do this. They started running at least some of their shows at existing large venues a while ago, sadly.

[TheGRS]

Again though, there are plenty of events that already do this and have people for handling logistics. And indeed people with temporary jobs involved.