When i did the figures before i bought it, it worked out i was going to end up with about 3k more in my pocket per year if i didn't go for the lease (thats not including the fact that i got insurance half the price through the lease compared to privatly insuring it, and that i've spent 3x more in maintenence than i estimated when doing the figures - so it would of worked out even better for me.
My exit fee is 1 month of a lease payment i think, so not too much.
I still don't belive you need an accountant to do the figures - its just a few numbers, punch them into an excel sheet and compare them. Compare what it woudl cost if you paid for everything post tax, and then what it would cost if you did it through the lease (pretax) plus FBT.