Quality or Quantity

So just starting mass tabling sit and go's and it seems I am breaking even and making nominal amts of money by 8-10 tabling. I was making way more when I was playing less tables, wondering if this is a variance thing.
My thoughts here are to maintain max of 6 tables while playing and see how that goes for like a couple of weeks or a month. If that goes well, take my time and move it 7 tables slowly. We'll see. Cya