As for tongue weight, most would not be a problem, but you should check it when you are looking at a prospective purchase. Most of our neighbors had New Holland rakes, that were no problem to pick up and hitch to the tractor. However, my dad bought a Massey Ferguson rake that had a tongue weight well over 100 pounds, took two people to lift it to hitch easily. One person could hitch it in a pinch, but it was an absolute bear.
Eddie - a 1959 International Lo-Boy named after my father in law, who who bought her new.