Hey MrG,
Wow Sir, your organization of your tool wall is outstanding! It looks like a show room in Home Depot or Lowes. I think you need a drill or two more because you have some "open" space here and there, hahahahaha. Yes, having a limited work area DOES require one to use logic and heavy organization in order to keep a clean and at least somewhat appropriate area for work. I JUST completed a couple of drawers for under my work bench to also "organize" my work areas. I'd been working in somewhat clean and semi-organized situations for years but, I finally got around to really cleaning things up. Not as much as you but, it's way better for me. Pics below show the old system and the new drawer system.
As for your work in the boat, outstanding Sir, outstanding! You've done some real "re-work" of stuff that yes, it should have been done better when it was originally built but, we all know that sometimes, quality is quite often sacrificed for quantity and cost. I like your idea of using a magnet for a door latch. I've done it a time or two myself. I've not done it in your potential application but, I did it in the retention of keeping my front and side gates OPEN without putting or attaching something to the floor, like was done on our rear gate. I'll provide a pic or two but, I don't know if they will help. Another potential method for keeping your doors closed is with the use of industrial VELCRO. You can glue it on the two facing and contacting components and it will hold very well. Just something to think about.
Being a DIY type for decades and attacking lot's of jobs like what you've done, I can surely appreciate your incredible hard work and tenaciousness. And you get a fantastic feeling of accomplishment and PRIDE! Again, well done Sir.
Scott