I agree
I had a friend with the washer dryer in his 460. The washer dryer, in the port cabin is probably a "splendide" brand. It most definitely is not disassembled. The door opening to the port cabin was enlarged to accommodate the installation of the unit. Once the unit was in place the opening was restored to the original dimensions. I had a "splendide unit in an RV, it weighs 168 lbs and it cannot be disassembled. I know because I removed and reinstalled the motor several times but that is another story.
The unit was installed after the boat was delivered to Bremerton, Washington. I have a 466 and was told that to install that unit I would have to undergo the same "joinery surgery".
On the 49, you need to cut open the door opening, and then re-construct it.
So, you have a choice of finding someone who is either a good cabinet maker, or a good mechanic / technical guy.
Either way it isn't going through the door without tools.
So, your choice on method.
I would opt for the disassembly, as you won't have a bunch of woodwork to clean up afterwards