Chris
No reason why you shouldn't be earning £1K a week, in peak season you should be able to double this. First thing I would do is get rid of the smart seal site and have your our for domestics, they all look the same Smartseal sites not original.
You talk/sound like you have the experience so just put it to use.
Too many people undersell what we do, which is a pity really.
Maybe start with a minimum price structure and stick to it, and not just that's £50.00 as I do this as an add-on attitude.
Positive thinking will start to get you going in the right direction