HI i am a big fish so i was just wondering if anyone has an idea on how many tables you should play to make a reasonable profit?

I play about 3 tables of cash ring ,1 s&g but this brings very little profit over 7 too 8 hrs off play.
Thus resulting in ,me going over my bankroll protection limits,to get a bit more profit ,thus resulting in no profit at all.

25tables is a bit overboard 4 0r 5 too little,
Any ideas .