If you only need PPC research – I would use Google Keyword Planner and do all your research in Excel in order to sort the entire list based on PPC Bidding Estimates. Always bid on low cost keywords – even if they only bring in less than 10 searches a month. If you have 100 keywords that each bring in 5-10 searches, then you can get 20-25 click-throughs for a COUPLE BUCKS!
NOTE: We only suggest having someone managing your PPC campaign once you are spending over $2,000 a month on it. Then having someone manage your campaign for $500 of that budget will pay off because a professional can save you that much through a single 30 day campaign optimization.