Individual wheel weight scales.

I’ve used several different brands. Intercom and Longacre. I forget the other one.

The biggest difference was the one I can’t remember was the older of the three, and you had to write down the numbers. The other two had printers IIRC. Haven’t used corner scales since 2007.

They are worth every penny. One thing you can do to offset the cost is scale local cars. The issue is going to be teaching the value in corner scaling. You’ve already seen the posts saying use truck scales, which are inaccurate at car weights and you can corner scale with them.
The wired proform for $700 were the ones I was looking at, a few hundred less than intercom and longacre. I'm retired, but I still can use a pencil, and I think I can find some paper around here, somewhere ......