It was my experience when I was looking for a new trailer that if the seller was equipped to transfer and adjust the trailer they would do it for free, of coarse there are sellers/suppliers that are just the middle man between the trailer builder and the customer and couldn't do it even if you wanted them to.
IMO Ed's should have offered to do it for free but it's also something you probably should have asked about up front.
If it's a Road King trailer and you're having to pay anyway but don't want to give any more to Ed's, give Harbour Marine in Norfolk a call tell them your situation and see what they can do. They're good people and can get your boat on there right.
4401 Pretty Lake Ave.
Norfolk, VA 23518
Phone - 757-961-9411