Leases for aircraft should be based on a monetary credit limit, instead of a limit on a total amount of leased aicraft
Detailed Description
There should not be a limit on the number of aircraft leased based on your credit limit. Instead, like loans, should be based on an amount (perhaps shared with cash loans) in value you can lease. For example, with a credit of 500 million, you can lease a wide body aircraft, or a few smaller aircraft, as long as the total value of the lease is under 500 million.
Context
Most people feel that this is better than the number of leases system. The current system encourages leasing of large aircraft, as you are limited to the amount of aircraft leased. With the proposed system, it allows the player to devise their own allocation, without having to account what gives them the "most value."
Challenges of implementing this include on when credit is evaluated, and does the leasing of aircraft immediately decrease your credit rating due to liability? Or is your credit locked in to complete multiple orders? Is it like a mortgage where you get a credit check, and is valid for the current loan only?