Did you check out the lawn care business calculators
I put together? They should give you an idea of what you need to charge based on your costs. Plus you know how much you were paying for lawn care service so that should help too.
I like your business name. Good for you! Get some flyers made and hand them out. Get your business cards out to everyone you meet as well. In fact, you should consider sending an article to the local paper about your story and how you are starting your own business, that might get them to contact you and write an article about you.
You could offer a prepay discount of 5 or 10% if they pay for the entire season in advance. That's an idea. Or offer a free aeration if they sign up for a yearly contract. You might not even have to give anything away. Keep us posted on how everything goes and if you get any jobs you can't figure out how to bid.