Then just charge more than it costs you to do the work. You will make money that way. /forums/images/graemlins/wink.gif
You first must know what your time is worth, and what your equipment cost you per year, then can figure per hour, etc.
I charged a neighbor (who could have afforded to rent his own equipment and was too cheap to buy his own) $50 per acre to rotary cut his pasture and some hillside grass land (old pasture). He was shocked at the price. It would have cost him double to rent the equipment to do it.
Go by what you feel is fair. Why isn't he buying his own equipment to bale his hay? Probably he can't afford to buy equipment just to bale his hay. That reason is why you shouldn't do it for nothing, and he shouldn't expect you to either. /forums/images/graemlins/wink.gif