Was your pressure ever near 125psi? IIRC normal residential pressure is much less. maybe your regulator is broken or misadjusted. When you turn the water on in a sink, does it come out with the same sort of pressure you have at home and elswhere, or does it shoot out more forcefully? If they are charging you 350 to change the hose, I think they should be measuring the water pressure when they are there.
I found that hard to believe, given your problem, but various googles, the last one dishwasher hose bursts "hobart" didn't find anyone complaining about a burst hose. Maybe some other search words would find more?
Can't you use a competitor's hose, with the right adapters. I looked at
When I go away for a month or more, I turn the water off to the whole house, but other than that, the water is on to the dishwasher and the clothes washer all the time.
Under 10 years after I moved in, house 4 years older than that, I heard a small noise coming from the water pipes upstairs when I woke up in the morning. In the basement, I found that the washing machnine hose was spraying water from a slit in the hose. It got things wet. It soaked a set of DC and suburbs white and yellow phonebooks someone had given me and there must have water on the floor, but not much money damage. At the hardware store, the manager said they sell a lot of washing machine hoses after the original ones spring leaks/burst, and he recommended woven SS clad hoses.
It's been 30 years and one started dribbling just a tiny bit at the end, pprobably where the end rotates. I could stop it by pushing the hose into a different position. So I replaced both, but neither had burst. These are nothing special, just whatever the hardware store and then Amazon had.
Sure, if they are corrosive. I kept a cardboard cylinder of "crystal" toilet bowl cleaner under the bathroom sink, when it came packaged that way (with a smaller plastic insert in the top to get the cleaner out. Remember?) One day I found the cardboard damaged, bubbly, from humidity?, and the hinges on the nearer door were damaged. Door would shut but it sprang open an inch when I let go. (I got matching replacement hinges when a neighbor remodeled their bathroom and left the old cabinets on the curb.)
FWIW, the hinges are brown and I couldnt' see the corrosion on the hinges.
My best guess is corrosion from the chemicals or that there is a bad lot of hoses and you keep getting a hose from the same lot. Buy from somewhere else, at the least.
IANAPlumber