I actually have no idea what this would cost in American dollars and probably don't want to know. I also don't know why it would cost extra to have the portholes fitted...?
But oh my goodness, Yes, please, I'd like one.
I'd swim in it every night and probably turn that Yellow Submarine Tea Infuser into a toy to play with while swimming.
Glub, glub, glub...
The Porthole Bath from The Water Monopoly
Image from The Water Monopoly here.