Lawn care is a science. And lawn care is dynamic.
And only you can answer the question of what to put down. As a businessman you need to decide what you're marketing, how you're marketing it, and how are you going to deliver what you're marketing.
And there are a whole array of products available other than alfalfa meal which will make a lawn green, while enhancing the soil profile . . . if that's your goal.
There are a lot of combinations that can work - have you considered a bridge product?
Use all the tools available to you.