In my old Congo their was an Elder who did tremendous work for the RBC, well, they pissed him off somehow, can't remember the details, but for the next three K.H projects they had lined up, two new Halls and a major refurb. he went and got "Worldly" companies to tender for the jobs. He had all the plans and details etc. plus he was in the trade.
Guess what ? They came in much cheaper !
Even so, it was all overuled and they went ahead with the usual practice. which was to use JW's to supply everything, of course these guys were ripping off the individual Congregations, but were all hand in glove with the RBC.
He went back to helping them after that, I really don't know why, just status I guess.
I had personal experience too of this kind of "pricing". Our Congo needed a new Sound System (badly, the old one was a steam driven one LOL), so I knew a guy in the business, he quoted for a sophisticated (for the time) system that monitored background noise and adjusted, babies crying etc, he worked out the best place for the speakers etc, to give a very natural sound.
What was the decision ? go with the guy who supplied the RBC with systems for Quickbuilds. More expensive, and just as out of date as our old system, big "holes" in the sound as you went to odd corners of the hall etc.
No wonder they get through loads of money, JW's have latched on to it and are milking it for what they can get.