Do you know what was the attendance? This would give you some idea of what the 'head tax' was.
It would be interesting if a large proportion of attendees could be persuaded to refuse to give anything. The circuit fund would most likely be emptied and there would still be a deficit. I wonder how the WT would respond to that?
In our neck of the woods, the local circuit has their CA at a middle school auditorium. A nice, well kept place that seats about 850-900. The cost to the circuit is a little under $2000. That's 'Satan's system' trying to rip God's people off I suppose.