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I assumed the extra cost was not because of the unrestricted bandwidth (Granted I have Xfinity in Chicago and only pay $15 a month for unlimited on Gigabit)but

I assumed the extra cost was not because of the unrestricted bandwidth (Granted I have Xfinity in Chicago and only pay $15 a month for unlimited on Gigabit)but because of the static IP(s) associated with the service. In addition I would assume that trouble calls are elevated over that of a home user with quicker response times. Just looking at Biz service vs home and assuming that's because of unlimited bandwidth is 1:1, there's more going on there that's different between the two.

vel0city 7y ago
Until a few years ago the cost to get additional IP addresses on most business ISPs was pretty minimal. The ISP my company uses does not even charge for additional IP addresses, you just need to give good reasons for why you need a larger IP space. With a previous ISP, additional IP addresses were about $10/mo but the cost of service was easily 3-4x similar rated speeds as a residential connection. Most of the additional cost is due to increased capacity planning and faster service times.