Re: Glossing a commercial turd
'Bunks as shown in the photo would require a lot more "housekeeping" between flights if they are to remain pleasant to use, no quick dash round with a binbag & vacuum cleaner there, so turnaround costs go up.'
It's a module in the cargo hold, which should make replacing it with a fresh module the matter of a few minutes work during the turn round. You then have several hours to clean it on the ground before it goes into the next aircraft. As to whether they can charge enough of a premium to cover the extra cost is a question I can't answer. But then they can charge several times an economy fare to fly people in first class which objectively isn't that much better an experience*.
*Depending on airline, some of the US carriers seem to go out of their way to make economy a degrading experience which is why I've stopped using them.