The only time people perk up when I mention the burning of wood, is when I mention we've only needed to refill our fuel oil tank once in the past 6yrs. You can see them adding up the savings in their head. P.S. our hot water is via propane. I don't know what "have enough firewood" means. Minimally, I like to have enough on-site to fill the racks I know that'll be emptied.