Infrastructure don't necessarily indicate reliability. In my area we have many "shed shops" that are unlicensed and under equipped. Brick and mortar, bottom of the barrel labor rates, parts at cost, etc. When I tried to point these out I was told by those in power that they were understaffed and I must be afraid of the competition.
As far as mobile goes...a very good friend of mine had an old u-haul truck he used for mobile service. Fully equipped...compressor, generator, scanners, a/c recovery, etc. Fully licensed and registered in the state where he lived. He offered the same warranty as the "brick and mortar" shops. Did very well for himself.
As far as standardize I think the biggest beef is not your business structure, ie; higher labor, parts at cost, but the way we approach selling diagnostics, selling the "free" stuff, proving that we are professionals and not just a "shed shop".
Like I have said before your business models is yours...if it fits great! As long as we are all playing with the same rule book!