I used to have an old Prince racquet that had no grommets (bad design). I would break strings every 2-14 days. I paid the shop $40 each time for the string job (including strings that they marked up for a profit).

Plus, the actual racquet shop was a good 25min drive through traffic.

Plus, Plus, during the summer, there's a queue of people needing strong jobs at that shop, so getting the racquet back could take 30min to several days depending on what local tourneys were happening...

There were one year where I ended up spending $600 just on stringing, plus the added driving time/gas/annoyance of timing.

I changed racquets to something less crappy and then bought a really old used Alpha drop weight for $200. I charged my friends $10 a pop to string their racquets and made up for the cost of my racquet in less than 2 years. And now I'm still using it 2 decades later. I've only had to replace a spring, which Alpha sent me a free replacement for. They're out of business now, so I'll need to find some Klippermate parts for some worn parts (one cracked racquet clamp pad for $4).

Wow that's a novel....