If you consider Hearty seed mix to be second best to Penn State mix why not just use Penn State Mix. You could get it cheaper than the price you are mentioning for the Hearty Mix. If you are charging the guy 9 grand to seed his lawn is seed the place you want to settle for second best? You can get a 50 pound bag of Penn State Mix for under a hundred bucks. I seed about 50 - 60 lawns a year in Western Pa. I did 8 this past week ranging from White Oak, to Crafton to Butler and have another 6 or 7 to do this week. I hydroseed mine but seed is the last thing I would cut corners on.