I bring my bike inside the apartment when I get home, so It dries out overnight,
though it may get wet when i'm out..
and it gets frequent [diy] service to keep it running at its best.

beaters as a small sacrifice in high theft places, are a good choice..
then the loss is not so big when it happens.

overhaul and while stripped down rust resistant coat tube interiors,
and put a easily touched up rattle can paint job on the outside.