Sales Director, while managing a sales team for a $600 million system intergrator, I spent years trying to avoid the recruitment industry (corporate direction). I'll spare you the impact on my time.
In any event, there are a number of approaches which you've seen touched-on so far in the thread.
As I understand what you're contemplating, you might want to review an associate's site: http://www.ashlarperformance.ca/. In a past life, Paul MacLean and I worked together at Xerox Canada. He is focusing Ashlar on a similar premise but prefers to position it as providing, "... SR's as a variable cost of sales...".
We have worked a couple of accounts together and it's my sense that the potential is definitely there with the caveat that success is entirely dependent on Paul's ability to deliver on the promise (ie. SR's who will work on commission only).
You might want to connect with Paul and see if you can uncover his secret. I'll forward a rendition of this post to Paul as an "intro".
Good luck & Good selling!
Pat