Well, yes, that's because you're supplying your own labor, do not have to support a large building with perhaps millions of dollars worth of tools and equipment, you pay your own medical insurance and don't pay insurance on a large facility (you likely aren't carrying insurance on your driveway). You aren't paying for the yearly update training for techs., nor workman's comp.
I could go on, but I've made my point.
Regards,
Dusty
2019 Ram 1500 Billet Silver Laramie Quad Cab 2WD, 5.7 Hemi, 8HP75, 3.21 axle, 33-gallon fuel tank, 18” wheels. Build Date: 3 June 2018. Now at 105912 miles.