This isn't high tech. In the U.S. a setup like this would be well under a hundred thousand dollars. It's not inconceivable the moving walls by themselves could be under ten thousand. That's not going to buy you a lot of real estate in a dense city.

I believe his intent is to experiment and try out different setup and tech for his business. He's just eating his own dog food.

Look at this with more of a hacker spirit: experimentation is not a waste of money, but important for discovering new ideas that can further the state of the art.

Building/construction is a sector that has been stuck innovation-wise for a very long time. Or at least goes very slow compared to other areas of tech.

It might be one step along to programmable, self-reconfiguring houses of the future.

I'm also curious what the amount of money he invested was like. While I really like the hack I think it was a quite expensive one.

With a certain amount of money you can do nearly everything. The art is to do it with less.