Not very often I agree with Radek.... but I have to in this case
Any Tom, Dick and Harry sets up as a carpet cleaner, as they see it as a huge source of income for very little work.... Sorry to poo on the parade... but the days of spending half a day putting leaflets out, and then getting 7 or 8 jobs from them, are well and truly over........ these days for carpet cleaning you will be very lucky (even at the low end of the market..) to get a return of 1 job per 1000 leaflets... I used to aim at the low end when I was using HWE... and had more trouble there than the high end big money jobs...
The niche of hard floor cleaning may just get you some money, but not as much as target leafleting an area for window cleaning, and then knock the doors within 2 days of the leaflets...
Do that and you could be getting 5 - 8 new customers per night, within 4 months a round is up and running.
With carpets and hard floors, each customer may come back in a year... but more likely 3 years...
For what it is worth... I think you should concentrate on 1 facet of cleaning and not try to be a jack of all trades... the money will come in quicker that way, and the outgoings will not be nearly as high...