You might consider epoxy-coating the floor - etching with acid pulls the gloss & any sealer off concrete like you wouldn't believe.

But there are better and cheaper products to go with if you dig out the exterior as i listed below. http://www.xypex.com/products/repair-accessorieshttp://www.xypex.com/products/coating-productsWith chlorine in the water says its either the pool water or city water. 

I have never, ever, ever heard an investor talk about their growing portfolio of 100s of units valued at $10s of millions and say yeah, we just throw a sloppy coat of paint on everything and slap down a floor, screw it, they're just rentals you don't have to live there.

The blade looks like it has sand glued to it all over. for example a typical blade:http://www.amazon.com/DeWalt-DW4843-Carbide-coated-Reciprocating-10-Pk/dp/B00004RH9Y

Some folks say there will always be lingering odor if I don't coat every last thing behind the walls.

I'd be happy to talk about your specifics with the property, but my gut says if the tile work is decent and so coated will look great, and you don't want to spend the money to completely re-tile, etc, the reglazing may be a great alternative. 

I believe he also gets a special coating/glossing on it too so small smudges, drawings, etc can be wiped away.

Also, home depot carries a product called 'red guard'. 4 coats of that stuff and it's like a layer of vinyl underneath the tile.

It could be about getting started investing in real estate, the best way to get a mortgage, the color of my dog's coat... whatever.

Well yeah.. blood is thicker than... water!