Frankly, if my neighbour started up a music business as a teacher and the sound of a drum kit thundered through the walls every evening and every weekend, day on day I would be complaining - wouldnt you?

Please put some perspective on this - if your business is not causing a disturbance and you are considerate to your neighbours then I can't see what problem you have. You still want protection when the business from Hell opens next door to you!