In fairness it is not a bad bit of business if you think about it logically.
Leeds have bagged a loan fee (undisclosed)
Cas get Zak for a year on a try before you buy basis
Leeds then get the remainder of the fee in 2017 when Zak goes permanently
Leed get cash for Zak. Cas get Zak and are able to pay in two instalments.
Hopefully Cas will be paying some if not all of his wages next season.
So actually from a business point of view win win all round