This is a real bummer. I saw these guys on The Fully Charged Show a couple of years back and their first car looked incredibly promising. But the auto industry is not easy to break and investors know that. Hopefully the solar roofs will prove profitable enough for them to try again.
You seem to completely disregard the fact that freeing up "a few units here and there" will have a material impact that lessens the need for immediate building of more houses in already overpopulated areas. I'm not saying, by any stretch, that we shouldn't build but obfuscating the issue with another does not help. The short term rental market is an issue for a lot of people.