Well, the Guinness folks don't recognize it anymore, since it might encourage dangerous behavior, but we're still going to try, in the spirit of fun. When it was a record, there were a few stipulations:
Three people total, only two can drive - all must remain with the vehicle the whole time.
There must be independent verification of the start and finish, along with odometer readings.
Documentation of arrival in each state is required.
No speeding!
On the 2018 attempt, Jason and Ryan traded off driving. We had a satellite GPS device that broadcasted our location every ten minutes and connects to Twitter. You can see the map of the 2018 attempt here. As for Rule #4, we didn't take any crazy risks, but its physically impossible to get this record without exceeding the speed limit. We kept to 10% above the posted limit - except for once we had the flat and abandoned the record; we were going pretty fast through the flat, empty Nevada desert. Cannonball runs are for other people to figure out; this record is more about choosing the right route.
On the 2018 attempt, we rented a Dodge Grand Caravan. It got great gas mileage (25+ mpg) and has fold flat seats - this allowed us to put a single air mattress in the back for better rest on the road.
We're not going to map out the whole thing for you - that's the whole fun of the trip - but we can say we're planning to leave from White River Junction, VT and arrive in Plymouth, Washington. Currently the route measures 6,660 miles, although we're constantly checking and rechecking for better options.
Our 2018 trip cost about $4500. This includes rental fees, gas, tolls, and food, along with travel expenses to the start and from the finish, as well as some equipment to make the trip easier. A generous benefactor has pitched in to cover these costs.
Well, we've got a full explanation in the About Us page, but needless to say, Ryan likes wacky adventures, road trips, and maps. This pretty much checks all the boxes. Short answer: Why not?