It would be really nice to be able to save the estimate to send to clients. Don't necessarily need backend for that - we can store data in the querystring for a fast & easy hack.
Building your own house seems like a pretty common thing from where I come from (Eastern Europe). Nonetheless, the timelapses he does look really cool.
Click on the location icon in top navigation bar, type in "Seattle", select it and then navigate back to the page. You'll now be able to see the contents.