Adword and seo campaign

I have a Limo website that need some work, We have the base structure for the website is kind of good. We have a very high competition in the Local area in the Bay Area, We would like to target 6 cities and make sure we will get business from there. I need a good offer for having a combination of SEO and Adword to make sure that every dollar we spend per week we can have it back as $7 so that's our target every dollar we spend would be multiplied in 7 for the revenue. Payment will be through here for the first 4 weeks after that you will be hired for a good monthly salary if you were able to maximize our sales this way. [login to view URL] is our website that we need the work on.