Originally Posted by
paradox
I did the same. My wife thinks my spreadsheet is crazy.:-)
My problem is I have to book through the Citi concierge to get the fourth night free, and they're unable to combine the two reservations.
Sorry, you're not understanding... One (or more) of your searches needs to include the fourth-night-free rules. Particularly, you must book a four-night stay at what ever rate you can get. Maybe giving up the free night will make things cheaper. Regardless how long you are staying a single reservation must cover at least four nights to get the free night.