That "full rebate" (in crypto) on AliExpress and eBay sounds like a great opportunity to snag a scanner for your family's vehicles! While a single scanner won't magically diagnose everything under the sun, there are some excellent multi-make scanners that cover a wide range of vehicles, including Chevys, Fords, Dodges, Nissans, Toyotas, and even Mercedes!
Here's the key thing to remember: car manufacturers can use different protocols to communicate with the OBD2 system(read more here). So, a scanner might work flawlessly on a Ford and struggle with a Chevy. The good news is there are scanners that are champions at working across multiple brands.