Model M Just saying. It's not like you have great alternatives on the red planet. And long distance travel there is likely to be more ground- based too. On the other hand, deliveries start a really long time from now, only 5 signature models will be built, and it is expensive as hell to send batteries up so those lease and insurance terms may be a bit more onerous. Efficiency will likely be higher (gravity and atmosphere density), however there are no roads yet so I would recommend not getting the 21" Ranger service will not be included.