One of the biggest rags I had at the saltwater boats built by freshwater centered companies like express and alumicraft, etc. was they use the same junk electrical components they use on their freshwater hulls.
Unsealed connectors and switches, plain stranded copper wire will all rot out pretty quick in salt air and no amount of washing will save it. There’s a big difference you just can’t see that will mean long term happy or not.
Marble Falls/Seadrift TX