Hi Donnie,
I agree about this idea being a great one. I just signed up for something called "Google Engage" (it's part of google), where you take a few online classes and they give you 20 $105 Adwords vouchers for clients. I imagine if you use the 20 and bring new customers they'll probably keep the vouchers coming.
I'm new to it so I can't say too much, but the extra $30 might get you the stats you need to convince a client.
