From my experience
-2000i
-2014
were solid performers
My Rambling on the Subject . . .
We could cuss and discuss until the cows come home about there after, none of the versions are bad tools.
They may have hiccups when the next rev hits the street but a patch or two generally clears any problems up, most common complaints of new releases seem to be related to the depreciation of what were viewed as fast tools to something a bit more clumsy until we users get are minds wrapped around how to use the new implementation efficiently, case in point Layer Manager, or Insert Block Dialog.
As long as you get a version that supports sheetsets and PDF import which from a basic drafting tool viewpoint have proved to be really useful tools I would think you would be good to go. I think you need to go with at least 2018 to get PDF Import.
As was mentioned in a previous reply the education versions are really nice tools to learn with, get that and a Udemy Course and you should be good to go.
My Limited 2 Cents 🙂
Best Regards
-Tim C.