I wouldn't worry about the website. Word of mouth and recommendations are what matter on domestic jobs. Commercial and industrial are all about who you know and getting on vendors PO List.
You need to build up a client list, there is no quick way to do this, you just have to keep customers happy.
My priority is to keep existing clients happy, and don't promise the earth if you can't deliver.
People might recommend you if you do a good job, they will definitely slag you off to anyone who will listen, if you bugger them around.