I just trimmed out a few posts that violated this board's rules of use. No personal attacks of any kind allowed. All posts related the the original that spawned some attack-like posts have been removed.
It is simple, really.
I learned this in ECON 101 years ago. The price is set according to what the market will bear. If you are able to charge more than your costs you make money, if not you go under.
The rest is all about convincing your customers that your product or service is worth what you want them to pay.
Supply & demand figures into it, but, really, supply & demand issue simply help determine what price you can get.
All this assumes a mostly unregulated industry (as far as price is concerned, anyway), such as RV sales.
...he informed me that first they would have to redo my entire braking system on my coach (larger brakes, rotors, etc) for that to work....
Go to another shop. This person does not know his trade properly. The tow vehicle's brakes are for the tow vehicles's GVWR only - any weight over that rely upon the towed vehicle's brakes.
You Ford owner's manual will tell you this.
As for simply replacing the hitch receiver with one that has a higher rating, that should work if the vehicle was modified properly (frame stretch or and/extensions) per Ford's Q-18 modification guide referenced in a earlier post.