Need advice on my eco-friendly beach shack commute strategy.

I'm in Atlanta, GA, and I have this shack rented on the coast that I would love to get to. I'm going to buy a car for this commute and wanted to know what y'all's opinion would be.

Please consider the ratio of how many people getting transported vs how much space/resources taken. At what point does my passenger load get large enough to justify it? What if I was moving 10 people, 15 people, 20 PEOPLE?!

Like I said, I have a crap ton of people who love to go to this shack on the beach (though I should also note that one of them is crazy and has the weird obsession with glitter and has been known to, like, throw glitter all over everything including the road and we all know that's shit for the environment).

I have my eye on this whale of a Chrysler that should do the job. It's old, like from 1989. It's huge.

Would this be unethical to y'all? and if any of y'all are in Atlanta, hit me up if you wanna join up.