For the 'rank and file' of them, that's true. But there are some (probably not many) 'elite' MAGAts who might be 'interested' in owning a Tesla.
Some are wealthy urban 'business people' and they might buy one, but I doubt it would be because Scrotus told them to. But quite a few of them are actually wealthy rural farmers and ranchers and I don't think they'd buy a Tesla on a bet.
There are some big ol' places in the midwest & west and regardless of what they may say about how 'dirt poor' farmers/ranchers are, they have a shit-tonne of money. We know a few of them (mostly ranchers) and despite what they say about how hard done by they are, their lifestyles tell a different story.
I'm not saying there aren't farms and ranches suffering, especially now. Just that some are doing very well thank you.