PPC/Adwords Campaign Management & sustained enagement

I have a few websites related to corporate training & leadership development in the management consulting industry. There are about 5 sites. I am experimenting with Google adwords but am unsatisfied with the results. I am looking for someone to create and manage the Google PPC Pay Per click campaign on my behalf. I am looking for better ctr and of course better conversions. My starting monthly ad-spend on Adwords is $400. I am open to someone suggesting changes to the existing websites as well as adding landing pages or doing A/B testing. The bottom line is I want to get a useable conversion rate for my expenditure. So far, I have spent about $200 and had $80 in sales. My goal would be that the ad expenditure is 10%-15% of the sales volume. So, if I spend $500 on adwords, I am looking for $4000-$5000 in sales. Once the business model is proven and I have useable metrics, I am going to be expanding my services. Just can't do that until I know how to convert the traffic. This project will turn into an ongoing project for someone who can give me results. I set the budget to Simple Project ($30 to $250) to get the campaign configured and setup and do some initial monitoring of it.