There are a few things you need to think about when planning your website. Let’s take a look at a couple here.
First, what is the goal of your site? Is it strictly for information? Are you selling a product? Are you selling a service? Are you trying to build up a mailing list? Ideally you want to have answers to these questions when you start building your site.
Do you need a commerce site or a blog site to be able to update and add information to be archived?
Would you like a visually stunning site or do you want to keep things simple and clean.
Would you like members to be able to log in and access a members area?
These are all things to consider when budgeting for your site. You can always start simple and build as your business grows.