What Ian the Fish said.
You play 1 table = you can make "plays", think over every action, see what your ops do.
You play 24 tables = you play TAG(basicaly you must) and you focus only on PT or HM stats.
If you what a rough estimate (although accurate if you ask me) this
is good. You can count up what you could
That being said I think you should try it out your self 1 table at a time and adding if you fell you can handle more.
Personal exp incoming:
At micros you can play 18 tables and be winning good $. The ammount of A2o shoves or pulling 2nd pair for 1/3 pot bets till SD is astounding =)
The higher the limits - the better the players (obvs. I know). So playing more than 4 tables at 1/2$ was to much for me (but thats me). You can look on twitch or youtube that some players play zoom nl500 multitabling... I guess Im not that good or they are in some echo chamber =)