I agree that YOU should be your horse's primary trainer. Honestly, even though I've owned/trained horses since 1985, it took me awhile to catch on to CA's method. I had to watch a LOT of his programs to understand the "flexing", but now it makes sense.
Are you planning on buying the series? It's supposed to be idiot-proof. You see, I would sell a horse if he didn't turn around in one month and get with "My" lesson program.
I HAVE to use ground training now. The horse market has fewer and fewer affordable finished horses, I am MUCH older and break easier, and I don't have 5-10 hour lessons the drill my horses with, like I did when I taught lessons.
CA also sells a book that might help. Don't know how much you want to pay. If you can afford a trainer 5x/week, then definitely find a new one who is available. It's not personal, just a business transaction, anyway.