When you hire an Adwords expert, what you're really paying for is

1. Ad text that grabs clicks. The highest CTR ads rise to the top and actually cost you less cash becasue Google is all about making their users happy. Low CTR = less revenue and higher cost. Lower CPC algos don't kick in right away. So I recommend a long-term strategy.

2. This expert also needs to understand your business. Because clicks that don't convert are useless. So you should have some recommendations from this expert on how to improve your landing pages. Creativity factors in here, and the expert needs an affinity with your market.

Basically this takes experience and experimentation. So if you have a good product and strong market demand, find and hire an expert.