Counterpoint: The IC at the heart of basically every cheap meter is a clone of the IC in an old Fluke DMM
https://www.pa3fwm.nl/technotes/tn27a-voltmeter.html
Honestly I would say cheap out on the DMM and splurge for a good oscilloscope, you get much farther with that.
But, I'm someone who doesn't do high voltage much, or really at all.