I created this website two days ago, and during that time, have witnessed 100s of comments on Hacker News, TMC, Twitter, and more. In the middle of all that, electriclove on Hacker News found an important bug in the model: The Ody PV line was adding in fuel costs from another car. (This, IMHO, highlights how valuable the Internet is for discourse and fact checking.) I also added in an extra $1200 every 3rd year to the Tesla for tires. I updated the model and the result is as follows:
Tesla Model S: $42,083
Honda Odyssey: $37,235
The end result is greater parity between the depreciation and cash flow models; and the edge goes to the Honda Odyssey by $5K, or about $600/yr over eight years.