I to am an OLE GUY, 71 this June, and have thought of ways of motoring myself around. My session at HH Friday was cut short by the wind, and the fish were biting, sucks.
I have looked into a product by Bixby, small propulsion motor that attaches to the underside of your tube. Battery is lithium, lighter and longer lasting than a conventional lead core battery for trolling. But the drawback is the price, $1000 for the setup. Their is another unit made in Europe that has been discussed here, da can't remember the name, and it to is $1000. But I did find a trolling unit with a short shaft, made for yaks and tubes for around $300. I have not looked into a lithium battery for a trolling motor, don't know that they make them. Oh and at one time a guy made a small inner tube for trolling motor and battery that attached to the bow of your tube, it pulled you through the water. That's about it, hope this helps, welcome aboard..........GT