1000 yen Access Narita Bus to Ginza. Hotel choices much less than Shinjuku. Night scene here is for those with corporate accounts but you can still walk around, or admire at the hundreds of taxis lined up for the night crowd. 930 yen Limousine bus to Haneda in the morning.
You can always spend a few hours overnight at a private booth/room in an internet cafe near every major train station.