Do you think that trying to become a professional at a hobby is a good plan business wise? Professional gamers, airsofters, paintballers, skateboarders, etc. If your dedicated and become really good then you get sponsored by companies who want you to promote their gear. You can also make money in tournaments and even travel around to different events trying to win prize pools. It sounds like a fun lifestyle that's a lot different compared to your average business venture, especially if your doing something you would normally do for fun anyway. The idea can be expanded if you become an expert of your game, building a blog with cash flow from affiliate marketing or advertising. Recording youtube videos of your games and getting advertising revenue from that.