I'm rather fond of the DVM that Harbor Freight tools sells. I would consider it adequate for constructing our kits, and it's currently available for $6.
Those are also "Shirtless" George Anderson approved!
I have 2 Mastech MAS 830, about $20 "at fine stores everywhere" with Grabber probes, about $5 extra for each. They are not auto ranging but perfect for safely attaching to B+ or other power test points (2 channel, right?) before powering up.
Then I use an auto-ranging Klein MM200, about $40 with banana probes for checking filament voltages and parts specs. I've thought about getting more Mastechs to
grabfilament voltages but its no more unsafe to move bananas than grabbers from 2 and 7, say on tetrodes to 5 and 9 on 9 pins which is the case for most circuit testing. Of course, you could use 5 DMMS with grabbers to do it all on an SE circuit but need another banquet table to place them in sight!
I could easily live with just the Mastechs but Auto-ranging is really convenient for parts testing and the Klein is really fast.