If your power bill is not expensive enough for your taste learn to weld. Make sure you go gas-less, plasma and carbon arc for cutting, stick and flux core for

If your power bill is not expensive enough for your taste learn to weld. Make sure you go gas-less, plasma and carbon arc for cutting, stick and flux core for welding. If that's still not enough start casting things. These hobbies also have the side effect of being great for one-upping your coworkers who do 3d printing.