I helped build a marina once, and apart from having to blast polyurethane spray foam on the entire bottom of the building that was built up on piles over the water, we then had to sheath all with my marine grade plywood that you typically used to build boats. Those God damn 4x8s were maybe 70 or $100 a piece, and this was back right before Obama got elected. I couldn't tell you how much they cost now, but we had to use the special caulking on all the seams too, and none of that stuff is cheap. All the boat slips and decks were Ipe, and our framer bought some fancy ass tool that would pre-drill holes for the stainless screws and feed them like a gun to screw it all down. Would take four or five guys to carry one 10x10x10 of that particular wood because it's just so goddamn dense.
There was a ton of it that had to be fire rated because it had a gas pump out there for boats to pull up and tank off, not as if there's not fire suppression for any commercial building in Charleston, but there were a lot more hoops we had to jump through because of the gas lines running underneath the building. Even the damn gas tank install was a nightmare, and I crawled down into those two power wash them prior to the final inspection. Doesn't matter that I was a superintendent / project manager on the job, you did what you had to do.
To try to stay on topic needless to say I didn't get a chance to play a lot of video games during that particular project.