Yeah, I thought goldfish might be more high maintenance.

I know there will be maintenance involved. How frequent, I don't know,
but I figure a once-a-week checkout and cleaning or changing water (I
plan to add a float valve to supply fresh well water, but I know
evaporation concentrates minerals, etc.).

But if I can avoid the daily fish feeding it would be great. Just one
less thing to do in my hectic life. So maybe a couple of smaller fish?
I'll check with a local pond supply. know there are small ones that
love mosquito larvae. And we have plenty of bugs out here in the
country.