The smart ones will own their shop outright. If not, they are on a longterm lease.

Also, don't knock it, a quality vacuum like a Kirby or Miele will go decades, are incredibly quiet, and just need maintenance on wear and tear, which these repair shops provide. I think we got used to thinks being terrible. Like my Dyson, does good work, it's also very loud compared to my financially secure friend's Miele.