A quick advert:
I've recently spent 2 weeks holidaying in Orlando - at the Villa owned by our very own Sandal Cat.
Can I just say that, even with 10 adults and a 2 year old, we had plenty of room, good facilities and a very nice pool. It's all looked after by English agents (one of them is a Bulls fan - but we'll forgive that), and it has all the amenities you could need. It is also around 10 minutes from the gates Disney and around 30 minutes from Orlando Int Airport (or 1hr from Sanford if you fly with Monarch from Manchester). All for a very reasonable rate!
If you are thinking of doing the Florida thing, make sure you speak to SC before making plans - you will be impressed by how helpful and how reasonable it all is!