In order to look professional as a netpreneur you really do need to own internet real estate in the form of your own website.
Free hosting is available, but in my experience those providers typically place their own ads on your web pages. Kinda detracts from the purpose of your trying to build a business online.
Here's a true bargain for your web hosting needs:
Yes that is my affiliate link. I am a Netpreneur myself.
But I'm enjoying their low rates myself, and do recommend this hosting service.