I actually thought most of his estimates were either bang on or LOW.
Rotational areas (one is being played while you are building the next one) require at least 50 acres.
One thing you overlooked completely are the hoops you are going to have to jump through with the Ministry of Natural resources now since they started diligently looking into what happens on paint-ball fields when airsofters use it.
Thousands of styrene BB's is something the MNR is aware of now and may no look highly upon in the future.
Thats coming from a Bastard.