That's not a very useful question to use in sorting out web hosting companies, though. Every rinky-dink hosting company can do that.
Dreamhost is fast hosting. It's reliable hosting. It offers all the bells and whistles, for the extremely demanding sites. And for less-demanding sites, like mine, with demanding webmasters, like me.
The smallest plan runs about $10 a month, and you get up to SIX websites at that price.
I'm on the Strictly Business plan. I have 21 websites (you are allowed 90) and the plan costs $79.95. That would be about $4 per site for me, as little as 88c a site for those who max out the plan. (Actually, I pay considerably less than $79.95, because Dreamhost has a "no price increases" policy, and I joined the plan when it was much less capable.)
There is a comparison chart of their different plans at http://dreamhost.com/comparison.html
I don't know how much you figure a website is worth. I figure a static page is worth at least $125 in labor, and an interactive one is worth $250. They don't last forever; pages get stale and out of date. So if you figure that a page is good for two years on the average, you're talking $5 to $10 per page in "depreciation".
You experience that "depreciation" whether there are people visiting your site or not. A fast, responsive website gets repeat traffic and gets recommended to friends, so it gets busy. Slow and unreliable websites often are abandoned by users before the page even appears.
Dreamhost is surprisingly affordable, but they aren't cheap. I figure I can't afford to waste my efforts on cheap hosting. You'll have to make your own decision about what's important to YOU.