Yeah, I don't no what all the zoning issues are, but $700 a month is a lot. I've got a business account for $99 a month, no taxes. But I'm not getting paying for top tier speeds, which is maybe what you need. I average around 35 to 36 mbps downloads, 15 to 16 up, which is enough for my needs.
Oh, and if you want them to separate your business and home accounts, good luck! I tried on three separate occasions to have them bill me separately for my accounts, but they never could manage it, so in the end I gave up.