Do you think I would be wrong if I were to set up on my own
Not at all, more power to your elbow.
. . . and steaL the cutomers from glaze jumping (my boss)
The word YOU used is steal! Once you're up and running, just think how you'd feel, and what you'd like to do, if someone you trusted did that to you. And, if that's the type of customer you're going to get - "Cheaper than my existing cleaner? Where do I sign?" - you can't complain a couple of months down the line, when someone comes along and undercuts you.
Any advice would be nice
I think you already knew the type of replies you were going to get, what sort of advice are you after?