Do you like your ski's??Most ski area destination rental car agencies have ski racks available for an additional charge of $5.00 to $10.00 per day. I have found you should be able to haggle for the $5.00 price.
The problem is most racks I have had experience with on rental vehicles are not very good. No locks, not that they are a major deterrent and the quality is poor...at lot of beat up barrecrafter racks has been my experience. Last January we lost 2 pair of ski's from the rooftop rack and fortunately the rest of our party was following us and were able to stop before driving over them!
I have always tried to give the benefit of the doubt to a new car rental company offering racks on their cars...to see if this one is better than the last, but usually come out disappointed.
The best solution I have found is to bring along my own. I try and call the rental counter (sometimes kind of difficult) where I'm going to be renting from....I usually rent SUV's since I don't want to be snowed out...without 4WD, and find out what specific vehicles they have to offer. Then I pick up the mighty mounts (Yakima) for those specific vehicles and hope I'm right. I now own 3 different pair of mighty mounts so I usually am set now from having to purchase new ones. I have spent about $60.00 (on sale) for the mounts but have saved over $150.00 on rack rentals, plus I know my rack is secure. I think the mounts now cost in the $25.00 range...so you do the math to see if it is worth your while.
I have only not been able to do this one time....due to the rental not having factory crossbars, otherwise it has worked great....I just put the old Yakima Powderhound in my ski bag...wrapped in fleece garb or whatever! I have even had the rental car checkout people help me put the new one on once, and also have had checkout people tell me I can't do that...so I piled the ski's in the back....and put it on later. Nothing in the rental contract I could tell that says I couldn't do it....just will not insure if something happens to the equipment. If I'm not mistaken, they won't cover any damage that may happen with their rack either since it is not factory!