Today, I gave in to the obvious. I bought the smallest, cheapest vacuum cleaner I could just to do a quick clean regularly. I'll keep the big one for washing the carpet and couches, etc. (With pets, and with kids even though they're grown-up, there'll always be times we need the carpet and lounges washed.)
It was a long shopping trip today. I had to stay out for a couple of hours, because I was waiting for my car to be serviced. I was exhausted when I got home.
After a few hours' sleep, I got the new vacuum out and had a quick run over the lounge room carpet with it. Compared to the big machine, this new one looks like a toy, and it feels like a toy. It is very light weight. It probably doesn't work as well as the more powerful vacuum, but does a good, basic job. For me, that's good enough. (And the big vacuum cleaner/carpet washer is still there for a thorough clean whenever I'm well enough.)
Any time I can find a lighter, easier, way to do any household task, I'll take it.