This thread is kind of serving to educate others more than me, but it's all good. I am still waiting to hear back from the manufacturer on how durable their coating is. Most roof coatings are asphalt and never really harden but this is not the case with this stuff.
Anyways, in regards to other suggestions here are some of the problems with them. I am not trying to argue, or dismiss your ideas, I have thought about and researched a lot of them. If someone else is looking to do something similar they should know...
1. Waterproof vinyl flooring. The stuff is great, had it in my old fish room. However, the water DOES get through the click joints. With cement underneath, probably not too big a deal, with subflooring, you need to put red guard down. Then you may have mold issues.
2. Epoxy. You can NOT put epoxy down over wood. Epoxy is awesome, have it in my garage, looks great. Wood however shrinks and swell, even in the most stable of climates. The epoxy will start to crack and shatter. Please note.. those sweet wooden bars coated in epoxy.. both sides are completely coated, greatly reducing and even stopping seasonal wood movement. Pond liner referenced above is epoxy.
3. Linoleum.. yeah could work, tough to make the corners work BUT.. the stuff is EXPENSIVE. For something so ugly its staggering. It's more expensive than nice planks.
4. Pond liner. Yes! Would work great. The reinforced stuff, not the hpde shower line stuff is actually light and very strong. I wanted to do it, but the wife is against it

I am worried about getting all the wrinkles out, but it is a great solution.
5. I thought about self leveling concrete and epoxy. But the self leveling stuff will likely crack. .I have used it before on bathrooms to cover radiant floor heating elements but that was over a solid layer of concrete board.
6. Selling everything and develop a cocaine habit.. thought about it, would probably end up buying a fish tank to help me deal with addiction recovery so...
7. Tile.. tile could work. Red guard the subfloor then add the tile. Tile is fairly brutal to install but it is relatively water proof. The grout though.. the salt water will attack any grout sealer pretty quickly and water will get under their. Do you know why your shower grout gets moldy? It's because the substrate is wet underneath it.
8. And now I am at liquid rubber. If it firm up when it dries it may work very very well. I am thinking --install frp panels, glue that rubber commercial molding down, then coat everything in rubber.
9. Fiberglass.. lol, I am not even going to address that.
Is there some wonder product I am missing? Thanks everyone!!