Carpet systems aren't that complicated, we do our own repairs and am as familiar with quality as any other grease monkey. While I'm neither a stockholder or a cheerleader for Amtex, but they're using Kolher and Honda engines, Roots blowers, Hypro pumps and their heat exchangers do the job. Everthing else is wires, hoses and design.
I appreciated that we could grab a good used truck, a brand new carpet cleaning system (hoses, reels, shelving) and wrap the truck for under 20k. [If we hadn't over paid for the wrap, it would have been a lot less.] Everything was paid for in under 30 days! Amtex service provided both during and after warranty was impressive.