Transportation from MCO to US and back again- cheapest way?

My husband and I are coming to Universal Studios in May, and I was wondering what is the cheapest way to get from MCO to our resort, Cabana Bay in Universal Studios. We will also be needing a way back to the airport at the end of the trip. Is getting a cab or using a shuttle cheaper?

Check out this page: http://touringplans.com/universal-orlando/transportation