Correct me if I'm wrong but...

I'm at level 48 and just got to level 47 quest. I have one of every building. I don't have the crazy stuff that costs millions. And I have all the free characters plus 6 premium rate characters (2 or 3 gotten free). I also visit all 100 friends daily. I leave all my buildings ready for friends to tap and by the end of the day I have collected from just about all of them. I put all characters on tasks every 4 hours or less during the day and on 8 hour task over night. From that I am pretty sure I am getting several 100,000 per day maybe more. If I had extra room I could even do a house farm that in the long run I believe would give even more.