I wanted to say your insight about a consulting business is spot on.

I also recommend Founding Sales and think it would be worth the OP skimming.

Also, search for Steli Efti (founder of a CRM called Close) who has some great content for outbound sales. I thought he did a session for Y Combinator's Startup School but didn't just find it. But he has lots of great content and a bit of a hustle mentality.