Yes, too expensive. People who live in $5k per month matchbox apartments in global alpha cities are not the type of people who buy luxuries.
Ask any high earner in a place like HK, central London, or Singapore.
They will wait for a cheaper Chinese copy.
At anything over 10k, you can get a perfectly good custom solution.
Source: the fact that I have a reputable, insured, etc. carpenter working on a floor-to-ceiling built-in bookshelf rig all along one wall, with a fold-out Murphy bed style desk incorporated that should be perfectly fine as a work space. Total cost at big city prices: < $9k.
Love the concept, would pay $2-3k for this, would not pay $20k and a month of re-building my room to fit this in.