The piece that seems wrong to me is your CPC with Adwords. 15-35 cents per click? It looks like Adwords is charging $3 - $6 per click for closely related terms. Yes, this is 10x what you're used to paying, but these are the customers who are the most likely to want exactly what you're selling.
Get a signup page in there and see what converts the best. For B2B, the sales cycle is longer than consumer-oriented businesses, so it's best to start by building some sort of relationship first: e-mail newsletter, free trial, etc. rather than tracking absolute sales based on the first click.