Ditto to Zogger. I figure a just about break even on the Revenue--firewood sales, used chain saw repairs and sales, chain loop sharpening and home heating bill savings vs. the Cost--equipment purchases and repairs, fuel, parts, supplies, and part-time labor. There is no money in it, but as Zogger says, think of how much money I save by not playing golf, paying exercise club or gym fees, hotel and travel bills to ball games, ticket costs, etc. I did that for years also, and believe me, it adds up big time rather fast.