The risk you run when adding more and more services is that you end up being not much good at a lot of things instead of really good at one thing. Years ago we did hard floors, curtains, ceilings, fire & flood, carpet fitting, etc, etc and found that really we were a bit of a jack of all trades and so we specialised in carpet & upholstery cleaning and haven't done half bad out of it ever since.
The problem is when carpet & upholstery cleaning is only part of your focus, instead of all of you focus, especially in the early years and you get tempted to add more and more services believing that that is progress you could end up being ok at a lot of things instead of fantastic at one. If you can offer a service that you are really really good at you will always have money in your pocket.
Simon