If all you need is a cable tracer/identifier, you can buy those for like fifteen bucks on Amazon.

https://www.amazon.com//dp/B0BTQ785LB/

Unless you truly need an advanced cable diagnostic tool, in which case the $90 one at home depot should be decent enough.

Or, if you want to REALLY get serious, there's also this option:

https://www.amazon.com/dp/B000QJ3G42/ (and notice that is the LEAST expensive option on that page.)