Hey @Brock Laramee,
When was the last time that you went to your mailbox and actually paid attention to anything unless it was a bill or a handwritten letter? You might glance at the front and back of an advertisement for all of 3 seconds, but other than a personal letter you aren't going to look at anything else.
My point is, a direct mailing campaign is severely dated. Yes, you might come across a select few people who will take the time to sit down and read your mailing, but a large majority of people will throw it in the trash before reading your headline.
I suggest finding more personal approaches to meeting potential clients. "Back door" approaches such as setting up a booth at a trade show or flea market (yes a flea market, laugh if you want but it really does work extremely well) will get you much more exposure, and exposure that is actually meaningful to your clients rather than a piece of paper in the mail.