Just be aware- that getting parts for some gear, isn't nearly as simple as it once was.
For one example- we order lots of parts from Bosch/Electrovoice here at the pro audio shop I consult with. We were back-ordered for FIVE WEEKS SOLID on a simple woofer recone kit- for a VERY common 18" subwoofer driver. And about as long for a replacement amp module for a powered PA speaker.
Many manufacturers simply refuse to stock significant numbers of parts of any kind, anymore. Trying to get specialized parts (the kinds that there aren't any generic replacements for) out of them can be an issue in futility, sometimes. Our local Berhinger service center, literally resigned from doing Behringer service altogether, due to this.
Fortunately, there have been some cases, where third parties step up to fill in the slack. Mackie is one example- when they ditched most of their service operation (about the time they became part of LOUD Electronics), a place called S&X Enterprises (IIRC)- made up of former Mackie service personnel, who were let go during the buyout- popped up, to do Mackie service. Without that, a lot of people would have been SOL- some of the procedures and parts are pretty unique, and if you don't have the ability to find those, you just don't fix anything...
Also, there's the issue of COUNTERFEIT parts. Especially transistors, Darlington "power pack" modules, and such. I've seen local techs with jobs held up for MONTHS, trying to find a GENUINE replacement part, that wouldn't blow up as soon as it's installed into a unit. I've seen counterfeit output modules, literally explode, when everything else in the circuit was PERFECT. Dissect them afterward, and you'd see things like transistors that are 1/10 as large as they need to be, to handle the needed voltage and current. Unfortunately, this is almost the norm now- you have to almost have the proverbial eyes on the back of your head, to not get ripped off by these crooks...
So, when you do find a good tech, that does good work, and is conscientious about the quality of the parts he/she uses- IMHO, it's only fair, to allow them some lee-way in terms of how long it takes to get something done. Fast, cheap, good- pick any two.
Regards,
Gordon.