Wanted : partner for trawler 28-32 feet

[Charbonn]

Looking to share a trawler I’m a private airplane pilot. I have Cessna 172. Sometime I’m flying to Bahamas Islands from East Canada.

At 60 years, I have just retired. I have the idea to buy a trawler of 28, 30 or 32 feet, rather recent, with reliable engine about 180hp. My maximum budget is around $100k.
I want to live no more than 3 months on the boat and I want that the boat stays permanently in the BVI and in Guadeloupe, all around in this big region. That is why I would like to share the property of the boat with a partner who could put at least $50k.
Every year, the partner and I, we would share the expenses and each would have the exclusivity of the boat for 3 months. For the other 6 months, the boat would be stored, either one of us would use it, according to the climate of the region.

I have done this kind of share property with an airplane in the pass. It was working well with honest and opened people. Of course a legal paper could fix the rules of the boat partnership. Question : this project is madness or if it is practicable? How to find the partner(s)? How to fix the rules? How to find the boat?