Something tells me you and your mates are car people. So issues are usually a mild cost and annoyance. The vast majority of people would struggle to replace a headlight and end up paying a shop. I help friends do all kinds of silly crap on cars. I also taught my sister how to do the basics like engine/cabin filters and windshield wipers. Cause it’s silly to pay $30-40 to change out a $12 filter that literally takes 2-3 minutes.
I replaced a water pump in my truck a month or so ago. It was like $150 for the pump, coolant, and additional various seals and a Saturday afternoon. The cheapest quote I got was ~$1400 from a shop…ridiculous. I was mostly wanting to be lazy as it’s cold and hate bleeding cooling systems…not paying that much of a premium though.
The shady tree mechanic people are a dying breed.

Design mock ups are the bane of my existence.
What do you mean it’ll take 6 months…you have almost all the work done in your demo.
I made some buttons that navigate between pages that have laid out controls on them. Other than those specific navigations…nothing works.