We're lucky to have to have a few shops locally but one in particular is the reason I decided to finally (10 years ago) invest in some basic tools and gradually build on them while I educated myself in most things mtb bike related (right up to wheel builds, bearing replacement and basic suspension servicing but not dampers, mind). Blessed art thou youtube.
Not long ago I was out with a friend who'd just picked his bike up from the shop I mention above who was supposed to have shortened his new brake hoses, rebleed and fit them front and rear.
Early in the ride he was talking about a bit of rotor noise and the derailleur not shifting quite right. I checked it out at the top of the first climb. The rear caliper was loose on the mounting bolts, the through axle was nearly completely wound out of its thread and the shifter cable was, somehow, on the wrong side of the drop out and getting eaten by the smallest cog. (I fixed it up and we carried on riding, thank jebus for good multitools and modern bikes using mostly allen bolts).
But all that for NZD$130!!
I made sure my mate knew he could just come to mine for the cost of a coupley nice beers from now on...