You are not sick---only bitten by the bug. As long as you are making the mortgage, putting food on the table, getting the kids through college, and setting something aside for your later years (kilted, of course), and not doing anything illegal or immoral along the way, you can spend your "discretionary income" on whatever hobby or lifestyle you please, and should do so guilt free. Just remember, no white kilt hose, tartan ties, flatcaps, or dishonoring the tartan, and you should do fine. Kilt on.