Paintball is actually a lot more expensive than airsoft, it's the addiction that kills.
I mean look at their "good" gear.
A descent Speedball marker is upwards of 1000$
Combined with boxes of paintballs. estimate 100-150$ per 2000
And they use much more than 2000 in a day. It's just that airsofters tend to buy many different kits, camo's, guns, accessories than paintballers, who stick with one marker, and just buy paint.