Give yourself 30 minutes to get from the CR monorail station to EPCOT for the EMH. That should be plenty of time even if you have to wait at the hotel and the TTC for a few minutes....the TTC is the stop right after CR, so no lag time there, and once you are on the EPCOT line there are no stops. Coming back to the hotel takes longer (have to make the MR loop from TTC, via Poly, GF and MK before getting back to CR), but it is still a fun ride.