I want to be able to sleep in my next car, and not have it be a miserable experience.

Is there anything you can suggest to me that will suit someone who is 6’4" or 193 cm?

I’m not very familiar with cars, so anything that might seem obvious to you I could be overlooking.

I’m also not interested in style, at all. I only want functionality/reliability (I want it to work, bells and whistles don’t matter) and low prices.