About 35 mins. BUT...the issue with DME is that you may not be the last stop. If your resort is the first of three stops, it's going to take you close to an hour to get to MCO! If you're the last stop? Just 35 or so minutes.
A car service will give you about 30 mins addtl time...at best. You should plan on getting to MCO about 2 hrs prior to your flight. If you have precheck, and no bags to check, then 90 mins will do. But, you will need time to get from your transportation to security, then get through security, then tram to the gate areas, then walk to your gate. And flights start boarding about 20-30 mins prior to take-off. I much prefer to have 30 mins to sit and relax before boarding..use the bathroom, buy a snack for my flight, sit and breathe.