Just to clarify the details of the paintballing example... Land is a serious problem except once it's no problem at all. If you don't know anyone who has land

Just to clarify the details of the paintballing example... Land is a serious problem except once it's no problem at all. If you don't know anyone who has land that they'll let you use, how do you find someone? Everyone I've met that plays paintball cheaply just plays illegally on land that they do not own, which may or may not seem unethical to other people. In my opinion, access to legal land actually is a significant hurdle for many people. Now, in practice, paint is the main cost. Perfectly good paint costs less than $0.05/ball (maybe $0.03 is a bit low-end), which is usually marked up 100% or more if you're playing on a paid field (this is their main revenue). The problem is, many players are accustomed to a play-style where they burn thousands of rounds ($50+) a day. If everyone agrees to use pump-action guns (cheaper!), you can have nearly the same experience at 1/20 the paint cost. If everyone around you is using semi-auto and burning paint, it's a lot harder to go pump (some people like the asymmetric challenge, but most do not).