I'm guilty of the opposite. If I declared the cost of the records I buy/sell (buy many more than I sell), initial cost of my decks, mixers, cables, mikes, speakers/monitors, subwoofers, headphones plus the annual electrical safety check on it all and any repairs needed and then wrote that off against what I get in "earnings", I'd pay even less tax than do now (20% rate for me for no other reason than I'm an owd bugger).

The extra income would fund a trip to a home game.