You worry too much. It's very unlikely they will drift, they're designed not to. Most people will never see any drift at all of a good multimeter.
Yes. I have a CIE 8002 I purchased for $40 in 1993. Never been calibrated, but still seems to perform within spec, at least as far as I can tell comparing it to my 87V and 34401A. Of course, it is only a 2000 count meter, but then again, I have done a lot of electronics hobby work with it over the years and can't recall ever wishing for more.
You normally only need calibration if you make devices that need a legal certification or something.
It seems a lot of people on this forum are really volt-nuts. Which is fine, I get it -- though I'm more of a time-nut myself. But from a practical perspective for hobby electronics work, you can get by with some pretty garbagy stuff.
For most users, more important than accuracy/cal is easy of use, battery life, size and contrast of display, how nicely the continuity works, etc.
And, of course, if you're measuring high voltage, low impedance sources, SAFETY.