Trying to bend my head around your post.
An aircraft's lease rate has nothing to do with it's hrs or cycles.
More to do with dry rate (aircraft avilability is the driver) and wet rate (how much does it cost to operate?). Right now there is a market for 752f's as a large US based operator can not get them through mod quickly enough.
If you are to aquire one, crew and maintain one the wet rate for you id based on demand for this size freighter and the fuel burn per hour your customer is willing to pay. The more efficient the more mony on your end.
Think you are asking how costly is a 752f to operate per hr fuel/lb or kilo. This is the selling factor in ACMI operations. I know of more 752's in acmi contracts than -f's.
Heavy mx is usually on the owner (your hrs and cycles play a factor here) and engines but this is detailed in a dry lease contract.
Suppose the first thing you need to know is the fuel burn at mgw/cruise, have a market that can take advantage of optimal usage then sell based on the hourly fuel costs and the variable of your operating costs in mind.
Not knowing your position in the transaction you inquire makes it hard for me to say. But dry,wet or complete ACMI would help.
Info 752F drivers could provide on fuel burn would help none the less, I do not have this information atmy finger tips at this moment.
I love the ACMI business, hope this was not a useless rant.