I see previous posts showing 55 cents/mile. I think we did 30-40 cents a mile (which was what my company would reimburse me, but they were cheap!) and then we added on gas, based on our large SUV (which doesn't get good gas mileage) and found that gas alone was almost 1/2 our Autotrain costs.
Most/some of those gas stations along I95 really do bump up the price, too. So check for gas prices along I95, not just what it is in your area.
I certainly do add on wear and tear as it does impact our vehicle, esp if it's an older/larger one like ours. We go every year so it takes a toll. Also, the potential of having an accident and having it delay/cancel out your vacation altogether has a price as well.
Another option would be to take the cost of renting a vehicle plus gas plus insurance and using that in comparison.
Guess it depends on how "big picture" you want to be about the costs vs. just what you physically have to pay for. Hopefully, your DH is the big picture person...it helps justify the costs!
Yes, flying on the red-eye might be a good comparison ... except the AT is more convenient in having more bathrooms, ability to walk around more and it's not "shunned upon" like on a plane. Also the seats do recline and are much larger than the average airplane seat. Also, only 2 seats and you are more likely to luck out with getting both to yourself on the AT. Plus you can just hang out in the lounge car for a long time, watching the movie, playing games your bring, snacking on cookies and hot chocolate ... and then when you are truly ready to crash, just go to your seats.
We had DD1 and DD5 with us in coach and ended up going to bed around 8:30pm/9pm, which was waaaaaay too early for us. So it felt like a long, long time there.
Yep! And we spend the morning in WDW before going to the train (we have AP so it makes sense). If we drove, we would be ready to hit the road early...so for us, by taking the train we get into WDW earlier (can be in the park by noon instead of only arriving in WDW in the later afternoon) and also get a 8am - 12:30pm day in the park before we leave.
Good luck in your decision.
I recommend trying it one time. We tried coach our first time too, just to see if we would like it.