John,
Looks like some serious thought went into the finicial feasability of the circus.... Good job putting this down and getting the discussion started. I have a couple of things to put in here.
1. Transportation if you are going to bill them for transportation reimbursement their might be some actual legal constraints, like a per mile payment, I know from working at a university this was the case, so something to ask people when you bill them, otherwise you could get around it by an in state out of state fee based scale. Also might want to just charge a per mile fee, this makes it simple to figure and easy for people to understand.
2. I think billing per person is a good idea, but I would start with a flat what it costs the circus to go, that would cover the costs associated with things and then charge per person the hourly fee that the circus would decide that they want. OK so for example under workshops you have one person 200 and two people 400, but then it changes to 500 for three. I would suggest having a basic fee, of say 100 bucks to show up and then pay the amount of people per hour. I would also have minimum amounts of people or payment on these, so like a 5 day workshop probably wont work with just one person. Might also look at having a per participant ratio to help figure the number of people and therefore cost.
3. About the copyrighting of things, I personally thing that everything created should be licensed under the creative commons license, give people some legal grounding, but also fits in line with the goal or vision of the circus from what I know from the summer.
4. My last thing is to keep it simple for us and for them, and have the billing fit the discussion of what will take place at the workshop so it can adapt.
Good work if this isnt clear let me know and as far as not know what it will cost for a year, that is OK, but it also depends on if this is going to be peoples livelyhood or just trying to cover costs. So if Carlos or Greta or anyone is going to get paid out of this, then its going to get into a different game were you will need to figure in an admin fee to everything involved. Like the outdoor place I worked at figured in 12-18% on everything. So find some place to fit that in.
OK thats my part, peace all.
Jason