I understand your situation, you are not alone with this problem.
I am 60 years old and had no desire to add any more aches and pains to my already aging body. For this reason I specifically designed and built my cart (The Appel Cart
) to be as easy to use as possible. I can load and unload my TI by myself and roll it over soft sand from the parking lot, down to the surf, and back again without getting a hernia or heart attack in the process. If you haven't already seen my video, here is the link: viewtopic.php?f=73&t=35157
I'd be glad to try to help you any way I can. Feel free to contact me.