Firstly, kudos to you for this very beneficial service. I don't know of your competitors, but believe it or not, they're not a bad place to start (if any exist). Track their marketing efforts, subscribe to their blogs/social media/newsletters/etc and see how this game is working for them. There are a ton of tools that allow you to essentially "stalk" their online presence in any capacity - let me know if you need a few. Borrow what's working, eliminate what's not. See what their customers are saying, asking, doing and go where they are going. Of course this all assumes that you indeed have competition.
If you do not, then as someone who targets SMB owners, I might I suggest tarting with compiling an organic list of targets, determining who the appropriate contacts are (by role/title, then by name), choose a CRM, hone your pitch and value proposition, and hammer out a campaign or two or three. Creativity is a big deal. Learning their likes and dislikes is a big deal. Persistence is a big deal. Treating "no" as 1 step closer to yes is a big deal. Understanding your sales cycle is a big deal. Customer tracking, feedback, and issue management is a big deal. But timing is everything my friend.
Luck is what happens when hard work meets preparation, and you must be persistent but prepared at all times to get lucky. The majority of all sales is a matter of being in the customers mind and/or space at the right time. Some of it is predictable depending if your product/service is cyclical (open season in your case), and some of it is good timing.
Understand that a normal closing rate is approximately 1 out of 10 (oftentimes less than 1) sales prospects. You sound slightly discouraged, but I'm curious if you're having this average, but don't realize you're on track OR if your issue is something more substantial like price, product, process, people or some combination thereof. Hard to say what's best for you without doing a deeper dive, but start with a list of your top 5 or 10 KEY prospects and court them like you were about to ask for their hand in marriage because hey... you are!