Haha. Supply & demand. No consumer wants airline & hotel yield management to apply to car rentals, any time, anywhere.

Alternately, go to your bank and tell them you'd like $25,000 for a few days. There will be some normal wear & tear - it might not be worth $25,000 when you bring it back. The bank needs to provide insurance for you in case you do something stupid and injure somebody else with the bank's asset. Ask the bank what fee per day they want in this arrangement. Stitch and moan if you have to wait a few minutes in line, and stitch some more if you don't get the sporty denomination you want. Tell them you're a loyal customer and really deserve $30,000 for the same fee. Let us know how this all works for you.