Thanks everyone found out the drop fee is over a thousand dollars so, needless to say will return to the airport.
If you want to return it to an alternate location, you have to arrange for that when you make your reservation. There is an enterprise downtown as well. Also if you need one way transportation, Portland has a train that runs from the airport to downtown. So if you don't have a lot of luggage and want to skip out on traffic, the train might be a better deal for you.
You can return to any enterprise but there may be an extra cost. You can make your reservation online with different pick up and drop off so you can see the total costs
That I don't know! I picked up and returned to airport. Sorry
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