I'm on the edge here.

Hey all, I just started my business this year, I invested I think way more than I should have, $11K, but luckily I have another job to pay for the investment. I've landed a whopping 2 clients so far, almost 3 but I had to turn down a 69 lot new subdivision due to too much re bar and concrete around, but i have been throwing business cards and fliers out like a mad man. I'm wondering if I may be in trouble if I need to pay half of that investment off by the end of the year. My goal for this season is to land 15 or more clients, is that unrealistic for a starting lawn care business? Am I in trouble? What could I do differently to get more clients? This forum has a lot of good info on it and have found it very helpful, and I'm sure there are some pros out there that could help me out. Thanks in advance.
Mike