Depending on your numbers its can work out very expensive. Its about $25 p/person one way. A cab for 4 adults is about $50. Most guests use cab from airport ot if you contact your hotel the hotels have a private car service which is about $80 from MCO and $55 to MCO. We used it to return to airport highly recommend.
Don't think any liners have used the shuttle service you are talking about. Mears also has a shuttle service but it stops at every hotel on I drive.