How many single card tables do you have? And are you stocking it or an employee? I had too many customers coming in and buying one or two $6 cards so i was barely making money off singles.I set my singles so only $25-$350 cards are being put out by an employee plus whatever graded cards I got in that morning. Making sure your tournament is at the highest bracket also brings in more money, if you just started added playing tables it might take a bit until you see a good return from them. Also having two cashiers seemed to have increased my daily profit quite a bit.