JR North wrote:

I only costs 5-6 bucks per chain at the local mower shop here. Why
bother doing it yourself?
JR
Dweller in the cellar
snip
*If* you have a local shop, *and* you're not in the boonies when you
need it/them sharpened, *and* you can afford to take it in every time
you hit dirt, a rock, a nail, etc. then that might possibly be a viable
option.
OTOH:
Using that rationale, why bother with doing/learning if you can have
someone else do it for you.