Go Giver. Multiple Entrepreneur. 12+ Companies Started/Bought/Sold. 20+ Companies Invested In. Best-Selling Author. Mentor. Speaker.
As a 20+ year salesperson/sales manager, and Dir. of Sales & Marketing in the software/technology arenas, from your description, I would say a salesperson is not the right answer to grow your sales. You're not in a position to support the runway necessary to give a salesperson an honest shot at success and it is virtually impossible to find a great salesperson in your industry without an aggressive compensation plan and a solid pipeline of opportunities. I would suggest that you pursue aggressive use of content marketing / thought leadership tactics (eg., Blog(s), Actively publishing posts on other Blogs / Magazines, Social Media - espec. Twitter, LinkedIn, Facebook, YouTube, Google+, & SlideShare), Webinars, Case Studies, White Papers, In-Person, Company-Sponsored Events, Research Reports, eBooks, Microsites, eNewsletters, Speaking Opportunities, Tradeshows, etc.).
Properly executing on these tactics should fill your pipeline - handle the leads internally - then consider bringing on a salesperson once the pipeline justifies it. I think you have many other tactics you can use to drive business at this time.
Feel free to give me a call to discuss your situation in more depth. Good luck!