GB,
We have an Amish community near here (13 miles) and they have big get together every year. They have a car show and a couple of them enter their custom buggies or carriages every year.
You have to look inside to really appreciate their since of humor and inventiveness. They have tuck and roll upholstery (some in crushed velvet and some in hand tooled leather) they have stereo raidios with six speakers or more and amplifier's. Most have headlights, tail lights and turn signals as well as windshield wipers and washers. Heaters are common but, I haven't noticed any air conditioning.
They may have 4 or 5 batteries underneath the floor boards. I think they charge their deep cycle batteries in the barn using a gas powered generator and no more than they are used the batteries will last going to town and back I'm sure.
They also have drag races with the faster horses and sulky's. Usually the youngest and lightest weight of the boys will drive them. They had a dirt oval race one year but I think they stopped that because of too many wrecks and tip-overs,
Rog