Turns out I'm flying thanks to timing and prices. I'll have to do the train trip some other time.
But the purchase is locked in. He already put down a deposit on a replacement RX-8, a 2010 R3. Flying out on the 23rd. Leaving Seattle the morning of the 24th: Seattle WA -> Portland OR -> Columbia River Gorge OR -> Boise ID -> Craters of the Moon National Park ID -> Idaho Falls ID -> Grand Teton National Park WY -> Yellowstone National Park WY -> Casper WY -> Cheyenne WY -> Kansas City KS -> Warrensburg MO
https://www.google.com/maps/dir/Duv...0x534e0f6d34af675b:0x3a610b733c05d57b!1m0!3e0
Then gonna stay there at my sister's and "work from home" the rest of that week, finishing the drive home the following weekend with a stop off at my other sister's in OH Saturday night/Sunday.
My 4th time crossing from coast to coast, all 4 with this same car. I've been to 45 states, 37 of them in this RX-8. In another month or two, I'll increase that to 47 total, 39 in this RX-8.