fishing sailboat

It's certainly not getting better in that regard.

 

Perhaps have a look here, Gamefishing Under Sail
Gamefishing Design - a 65' mast-aft sailing catamaran. https://www.runningtideyachts.com/gamefishing/

...or do a search on this forum, and you will likely find a number of other postings on this same idea.

To get off cheaper than building a new vessel, there are a number of older used catamarans on the market that could be had for a good price, and converted into a fishing version. Sorry don't have the time to look up some links for you.

 

SAILING TO A WORLD OF BIG FISH ADVENTURES
Part 1: The creation of Offshore Hunter
Many of us dream of travelling the world, chasing the biggest marlin at the world’s best hotspots.

Norwegian businessman Morten Ruud made that dream a reality, designing and building a unique sailing gameboat to enable it. Having now completed stage one of his round-the-world odyssey, Morten shares the creation of his dream and the first wave of his remarkable big fish successes.

BlueWater Issue 131 | BlueWater Boats n Sports Fishing Magazine https://bluewatermag.com.au/subscriptions/past-issues/bluewater-issue-131/[/QUOTE]

SAILING TO A WORLD OF BIG FISH ADVENTURES
Part 1: The creation of Offshore Hunter
Many of us dream of travelling the world, chasing the biggest marlin at the world’s best hotspots.

Norwegian businessman Morten Ruud made that dream a reality, designing and building a unique sailing gameboat to enable it. Having now completed stage one of his round-the-world odyssey, Morten shares the creation of his dream and the first wave of his remarkable big fish successes.

BlueWater Issue 131 | BlueWater Boats n Sports Fishing Magazine https://bluewatermag.com.au/subscriptions/past-issues/bluewater-issue-131/[/QUOTE]

Offshore Sportfishing Motorsailer, innovations & alternatives

 

You might also consider 'kite power'
New Age Trawler/Motorsailer; Kite assisted PowerYacht https://www.boatdesign.net/threads/new-age-trawler-motorsailer-kite-assisted-poweryacht.20319/