That fits with my analysis from a few days ago: https://news.ycombinator.com/item?id=17397505
> A tent, about 50 feet high, its taut grey canvas membrane supported by aluminum columns.
I don't think it was a joke. The tweet was specifically in the context of trying to convince investors that the cost of that tent production wasn't substantial and by "scrap" he meant equipment they had discarded from their main production lines because they are constantly upgrading them. You can't have it both ways. It was either discarded "scrap" machines they had lying around and he was not joking or machines they bought and he was lying (a.k.a "joking") about it. I'm giving him the benefit of the doubt that they really had all that equipment in a warehouse because its been reported they have re-tooled the line several times.
Repeating false statements doesn't make them true.
[1] http://www.sprung.com/building-components/performance-archit...
I'm a software guy. Can somebody explain to me how you can build a high-tech auto production line from "scrap"?