Vehicle choice

In July I will go from Prudhoe bay to Ushuaia (panam highway). I am seriously wondering which car to buy.

I intend to remove the seats and sleep in the back.

1. Toyota Sequoia hybrid 4wd

2. Minivan

3. Class B RV

I currently have a rented minivan (pacifica) which is amazing for the US, but I worry about a minivan will hold that roads in central/South America.

The class b rv I worry that it doesn’t drive nicely long distances, and draws attention of highwaymen.

The sequoia seems great. I just worry it might be a bit too small.

What do you people think? Anyone done something like this, experience?