At my local paintball field, its $120 for a case of paint. Plus a $10 entry fee. So $130 for a day
At my local airsoft field, its $30 for a bag of bbs. Plus a $10 entry fee. The catch. A bag off bbs lasts me 3-4 weeks.
Conclusion. It costs $70 to play airsoft every weekend for a month. Compared to paintball's $130 a day. Idk about you but that alone was enough to make me all airsoft.