This is a good idea, not fiverr but reselling SEO services. The problem is you need to have a good provider who will work cheap enough to make money on their skills, which isn't likely.
If you can actually land accounts though, you can make very good money selling and taking a commission.
If you can land local customers for me I will happily pay you 1/2 of first months value when they sign up. If you are good, I will kick it to 100% on a 1 year contract. I'd be an idiot not to.I am sure any SEO provider will make you a similar or better deal. his forum is full of people who cannot sell the service. If they screw it up, not your concern, you get paid for the handshake.
This way you can concentrate on income generation by sales and not have to mess with the SEO.