Four down is nice but if you have a vehicle that can not be flat towed then a Tow Dolly is not a bad way to go. It seems there are a growing number of vehicles that can not be towed 4 down. Many of the Electric vehicles such as the leaf, bolt and Ioniq can not be towed four down as well and since this is the trend for the future I suspect that in 10 years tow dolliess will be more common than they are now. Both our vehicles are electric and the one must be trailered 4 UP. I don't know about Teslas but some are all wheel drive and I suspect they must also be trailered.
Anyway, check out wether your vehicle can be towed 4 down and go from there.