Is this really fair?
How long is a piece of string?
Their requirements sound pretty involved to me. I guess they might be appropriate if you don't have much experience flying in Oz and want to take the airplane away for extended touring. If you just want to make local flights, it sounds rather excessive.
The 'bottom line' is a two-sided coin:
(1) It's their aircraft, so they can insist upon whatever checkride requirements they want.
(2) It's your money, so you can always walk away if you think that they're being unreasonable.
I hope that you will be able to arrive at a compromise that you can both live with.