Thanks to all who replied. Boardwatch (http://www.boardwatch.com/)
was a treasure trove of info. Here is a sample from their web
page at <http://www.boardwatch.com/isp/intro2.htm> derived from
their survey of 3000+ providers (if I read it correctly.)
Internet Service Provider Profile
(excluding top and bottom 10% of all ISPs surveyed)
Average time in business: 22.2 months
Average number of employees: 12.98
Average gross annual revenues: $637,571.76
Average annual revenue per employee: 119.55
Average hardware/software investment: $165,615
Average number of dialup customers: 1843.53
Average annual growth rate: 93%
Average number of dial-up ports 198.95
Average bandwidth to backbone: 2.94 Mbps
Average bandwidth per dialup port: 14.4 kbps
Average investment in hardware/software per customer: $89.83
Average price of 28.8 kbps dialup account: $19.95 per month