It's an interesting thing for hobbyists as we age, especially for those of us who have really gotten into it. It isn't a physically strenuous hobby, but it can be physical. I keep myself in as good shape as a lazy man can, and above all I keep the weight off in healthy ways. I try to keep my brain in shape - I know too many athletic people whose bodies are still working fine except for one organ, destroyed by dementia. So I just keep going full tilt until something falls off.
When it stops being fun, I'll start to shut down tanks. It's still fun and I'm only in my sixties. I'm still planting oak trees.
We all have to think practically, whether we're 20 or 80. Look at your set up, and figure out how to make it efficient. Money spent on time and labour saving activities is well spent. Lugging buckets and such is not fun, and not fun should be saved for your job. So if you can figure out a way to work around the drudgery, do it. It isn't always possible in all housing, in all relationships and in all periods of our lives, but what we can simplify, we should.
As long as you can manage water changes and you don't have a debilitating illness, you should be able to keep at least one tank for pleasure. Our hobby calls for a gardening mindset, but it doesn't call for the hard work that goes into a good garden.
Today, I stow away the last outdoor chairs and the table, the swing, and the barbecue. We get heavy dew from the sea, and this morning, it was frozen on the stairs. So while it's still strangely warm when the sun's up, it's time to take an hour and batten down the hatches. Then, alas, it's time to start Christmas shopping.
Out the front window, there's a herd of young deer with the zoomies, like a pack of puppies.