I think you're on the right track towards a good business move. I feel the key is in proper diagnostics of the problems and appropriate applications of the solutions.
For instance: There is a product on the Market called Pyganic, it is allowed for use under USDA "Certified Organic" it is a pesticide made from Chrysanthemum. While it is probably harmful spray this NATURAL POISON along row after row of Kale to combat a flea beetle infestation, used here and there in target area's of a lawn at targeted insects effecting target plants would probably be a step up from using the Dow Chemical equivalent.
If you really wanted to get all
permie with it you could grown your own patches of Chrysanthemum on your own and others managed lawns and whip up a batch of you're own.
Same applies for organic soil amendments like
compost. Plenty of info out there, and people to help point you too it. Layering Compost over grass clippings in areas that are having a hard time hacking it for whatever reason might be a good idea, it will certainly help if you have a baked compacted micro spot where the grass doesn't come in well at all.