The A380 probably didn't cost that much to charter. Barely viable early build (i.e., overweight) example that Singapore Airlines couldn't wait to get rid of and no one else wants in their fleet. It was flown to and sat in an airport in Pyrennean France by the lessor owner.
http://www.traveller.com.au/first-retir ... rap-gziiuo
https://www.forbes.com/sites/michaelgol ... fcf4541d65
Almost too cheap to shop through RFD