If you use Quick Books Pro, you only need your CPA 1X a year. Quick Books Pro handles Payroll easily and does 99% of the work for you. If it makes you feel better, have your CPA look over your tax filing forms before you file, it will be cheaper for a review than full preparation!
Market your business, every single month, and hit every prospect 3 times in a short time period - 3 times is the charm. If they don't know you are there, they won't call, right?