Just a couple of quick idea's for you... from someone that makes their living as a marketing consultant.
First read your ad again as if you are the target client you are looking for. You will notice the ad is all about you and not about what you can do for your perspective clients.
Next, who is your target client? Write to that person only. What is their income level, where do they live, are they single and entertain a lot, are they families. You are kind of all over the place here.
Be very specific as to what niche you feel you will fit best and market to that group only. This will allow you to better meet their expectations and your own. And as a side benefit your pricing can be higher if you are perceived as someone that specializes to that demographic.
Then advertise to that target market only.
If there's a yacht club near you, you could start hanging out there and networking. That's where you're going to find the coolest (and highest paying) jobs.
This is really good advice, go where your preferred clients are either in person or by advertising to them. Just as you've done here let everyone you know what you are doing and what type of client you are looking for. Include friends, family and business associates. When contacting them start off simple with something like... "I don't know if you know anyone that might need a professional personal chef, however..."
Also include a few references or testimonials from satisfied clients. I have hired trained chefs in the past to work parties for me and always wanted to know if they were capable of executing my menu's.
Best of luck to you, I think you are on the right track by taking the initiative to get out there and build your own business rather than waiting for someone to hand you a job.