5 couples = 5 bdrms, 5 beds, 5 bathrooms.
I would look into a 5 bdrm house with 5 bathrooms or a 2 bdrm 2 bath and 3 bdrm 3 bath condo.
WBC comes to mind.
Everyone will say we dont mind sharing a bathroom, we'll sleep on a pullout couch to save $$$. Dont believe them. 5 bdrms, 5 bathrooms it will make for a much better trip for everyone.
Any siblings? If it's like 2 sisters and their husbands then they probably could share a bathroom, otherwise don't do it.
Another option everyone can get their own hotel room. Try one of the Disney Springs hotels.