You might want to log in over at EricsonYachts.org: The Starting Point on Ericson Yachts!
, and put your notice in the For Sale forum. Just make it clear whether you are splitting the title or just looking for help with expenses. However you structure it, your insurance company company will
be involved, too.
Lots of (boat, plane, ?) owners have shared ownership and expenses successfully over the decades, albeit it working out badly for some others. Kind of like any relationship!