From what I know of NATE, that qualifies a tech to know which end of the screwdriver to use. I'm not sure I would promote that cert to anyone outside of the public.
In short, I can't say that it's a business model I'd expect to have a long lasting existence. I'm glad you have a good job, but man, I don't expect it to last real long. What the heck can you sell to a store that just had all the units replaced? Nothing, so you peddle the Co to another store, and so on. Pretty soon, with managers intermingling at different corporates and stores, you find that the golden goose has croaked its last.
The guys I talk to said they were much better off with Tradewinds and Benner.
Good luck with that.