John, I had that same starter set up and ran a single 12 volt motorcycle battery,, it turned over my quadra 40 no problem,, full 24 volts isn't need IMHO,,

Maybe you know something I don't but the OP didn't mention he was wheelchair bound also or handicapped in anyway. Not sure why you have to find opposition with any opinion but your own, No one was talkng about your unique situation, As we all know, hand flipping these is the common procedure at fields everywhere.