I bought an old BCS 745 about a year ago. It's one of the heaviest models they've made, so presumably the most difficult to handle. I'm just a few years younger than you and I handle it fine. There is a lot of technique that goes into it. When I first got it, I would get tired quickly from either tilling or mowing. Hell, in the beginning I'd get tired just from changing implements! But over time, I've gotten better at finessing the machine and it's now fairly easy to handle. I wouldn't want to run it all day, but a couple hours at a time is fine. I suspect a lot of people try them without the skill to finesse it, get tired quickly, and decide it's not effective. I'd bet that after a few hours on the machine you'd get the hang of it.