Originally Posted by Often1

Still no useful details. But consider that the hotel charges $25 and the third-party vendor charges $10. That's a savings of $45, not $60 for the three nights. And, from that you will need to subtract your public transportation expenses.

Perhaps a better question is: if you're at an airport which presumably has car rentals, why not turn the car in on arrival and save 3 days of rental plus somewhere between $30 and $75 on parking?