Hi,
That really does depend on how many people visit your site, I rmember
getting my first paid package and I bought LOADS of webspace and
bandwidth to be safe, but atleast it never went down due to it! Its up to how much you are willing to pay too.
silvermoon
You shouldn't really need to go over 1gb for a blog - that's more than enough space. Most hosting packages nowadays offer 1gb of web space for $5 - $10. You should be able to get a very reputable host for under $5 a month for the space you are looking for.
What you should look for is a hosting company that has a one-click install program that will allow you to install the most common Blogs. Our company has just that, and it's easy to set up in under 2 minutes. Really.