Surcharges would be approx. $2.50/day plus 10% --so for 7-days @ $20/day is $140.00, thus the surcharge would be about $22 for the week. Then you have to add the 6.5%(I believe)tax, which would be another $10. The total for the week should be roughly $172. These are all estimates but you can start to see the savings. To me it's more money I can enjoy on my vacation, I don't care if I save $10.