realisticly the most you will do in a day is around £200. as a stand alone business its quite hard going , advertising costs can be high .
as an add on to an existing business its a great addition. your overheads are mainly covered,(ie phone etc). you already have existing customers to sell to by letter phone etc, if you have a good reputation people already trust you. for existing carpet cleaners the 2 run brilliantly side by side and you will pick up work very easily.