will ocean front property kill 914s, RUST Options

[porbmw]

So
We are trying to figure out a semi retirement plan, and have happened across a rather stunning ocean front property.

It faces west, at the tip of Vancouver Island, and has a couple of channels funneling onto a small beach

The plan is/was to buy the property, and in time build a nice, comfortable home WITH (finally) a sturdy, well insulated garage that would store the 2 teeners and some other old stuff, some of which is already rusted and patiently waiting resto

As we were about to leave the vacant property, we chatted with the next door owner, who built there within the last 2 years.
Apart from confirming that we would experience severe storms, he noted that his less than 2 year old aluminum/powder coated railings (for glass panels) were getting severely pitted, through the paint into the aluminum, as were his exterior lamps (i anticipated degredation, but NOT to the degree he showed
AND
he said that even metal stored in his insulated garage, at the rear of the property, well away from ocean spray, was rusting considerably.

No interest in buying, if old cars stored in an insulated (but likely unheated garage) will turn to rust/

Any experience/thoughts?
Thanks
Paul