I forgot all about early & late maturity grasses & such (yeah, Im' still a little green when it comes to seed selection & planting. :v)) That is going to come in very handy with all of that acreage & only 7' of cut. I am getting better at cutting by the moons. It seems if you blend the foresight of the Almanac with the "instant" forecast from the NWS, one can make good dry hay.
I don't know if the rates apply to "antique" custom work, but I do know a plow pulled consumes fuel regardless. Guess I'll set a rate, maybe based on an avarage of rates from around the area, see how much gas the tractor sucks & how long the whole thing takes & adjust if necessary.