That option already exists. I honestly believe you can compete at a high level in a tournament with a lot of very affordable markers.
http://www.actionvillage.com/collect...l-gun-navy-tan
IMO it's the cost of the tournaments themselves which are the deterring factor rather than the gear. Gear is an investment in the sense that you pay once and can use it repeatedly, but tournament costs are an incredibly expensive way to spend a weekend or whatnot.