I won't say we ended up with anything superior, but we definitely benefited on cost as you mention! We have an intro writeup of our experience using OpenPlotter and a Raspberry Pi-based setup here.
https://sailingcourage.xyz/projects/plotter/
Something also not often realized is that many, many sailboats are actually quite old (20, 30, 50 years!) and so are their on-board electronics. Any chance to update wiring, instruments, diagram out on-board electronics, etc. is probably a really good opportunity for nav system and overall boat maintenance.
https://sailingcourage.xyz/projects/plotter/
Something also not often realized is that many, many sailboats are actually quite old (20, 30, 50 years!) and so are their on-board electronics. Any chance to update wiring, instruments, diagram out on-board electronics, etc. is probably a really good opportunity for nav system and overall boat maintenance.