This is completely the wrong reason to manage a business web site. Time and time again, I am called in to help on projects that have gone on for years precisely for this reason, and a related one - someone in the company wants to have control over the company site for the sole reason of being the "company web site developer" but eventually throws their hands up in frustration or cannot cross some line that needs to be crossed.
And every single time, it is a nightmare costing them far more than if they'd have taken the hit at the start. And it's always the same story - we love you, but we can't afford you.
Building web sites to expand your skills is something you do with a personal project, not a business tool. Think about this: having never touched a video camera, would you presume to offer to prepare your company a 30 second television commercial?
To assume the position of developer without any clue as to what you're really getting into, or the long term effects - I advise against it. You will be making decisions for all the wrong reasons (i.e., 95% of which will be presentational and "cool factor" over ideas you haven't even considered) and in the long run, it will hurt both of you more than it will help.
Again, this all may sound harsh, but I really do mean it constructively. Over the years I've echoed this "fantasy" in my mind, "if I could have only told this person what they were getting into before they started . . . " So here you go.
Budget, for a business, simply does not wash with me, and it shouldn't wash with you either. I'll keep quiet as to the why's of this - but there is always a budget for a starter web site, and there are always talents willing to work with you to help build it right.
But, should you proceed, this web site will help you. By understanding bad web sites - which is surely the path you will start on - you can avert some of the disasters. If you don't accept any of the advice here, I hope you can manage to study, and return, to this site often, use it as a guideline of what NOT to do - it will help.