that lease factor is quite high for the A380; it's typically 0.68%-0.7% for most other aircraft, so you're getting well paid for taking some aircraft type risk. for anyone interested there's plenty of data out there in the public domain (including purchase prices and lease rates): look at dpaircraft.com/investors/financial_statements.htm for 787s leased to Thai/Norwegian and dnairone.com/investors/financial-statements.html for an A380 to Emirates