You pay twice as much, for transfers, from Sanford because the distance of the Sanford Airport is twice as far as the distance from the Orlando Airport to Disney. In many cases the landing in Sanford saves you $50 to $100 bucks per passenger on the ticket as compared to landing Orlando.
All, that I know of, flights into Sanford are direct flights so you you are only are spending two to three hours in the air and no stop overs or changes. The airports you land at and take off from are much more convenient and are small so the crowds are minimal. Many cases, when you leave home, you spend 10 to 30 minutes going to the small airport rather than the big airport which is 2 hours down the road.
In Sanford there is no ME so you have to shop a little bit for car service to Disney. It will cost you $180 to $240 roundtrip for your family. Taxis are also available but they are usually higher than the car service companies. Rental cars are also available in the Sanford Airport.
So lets see if you can purchase a roundtrip ticket to Sanford for $200. and the same ticket cost you $325. landing in Orlando. You have 5 persons in your family. Sanford tickets $1000.00 and Orlando tickets $1625.00 you have just saved $625.00 on tickets. Transportation to Disney takes up another $200.00, so you only saved $425.00 because you landed in Sanford and couldn't take the ME.
If the Allegiant Airline package is more convenient for you, you do save money, time and walking landing in Sanford and transferring in a car service, taxi or rental car. Do the figures before you say we aren't going to pay twice much, for transfers, landing in Sanford than Orlando. Actually twice as much as DME is $.00 as DME is free.