I think its a really great idea, my only concern is that the sales staff you hire won't be as dedicated, enthusiastic, and knowledgeable about my product as I am. Sales is a core aspect to a company, and while it may be possible to outsource sales in an existing company after you've established processes, a young start up won't have that yet. Its a job the founders SHOULD be doing because you're still trying to get a feel for the market.