you can grow all the citrus's and banana's as well, just with apples, pears and the stone fruits you could have a battle with tropical fruit fly, which you may or may not win depends if you are going to do all this organically and sustainably? we always regretted planting thos soft f/f prone fruits should have stuck with easier to grow citrus.

do some research on the native varieties of fruits as well this one comes to mind Aussie finger lime (Microcitrus australasica ) there are many more.

here are a couple:

Jaboticaba aka Amazon Tree Grape - 'Myrciaria cauliflora' big down side the birds love them too.

Carambola, Starfruit. there are different varieties of these.

birds could also be a nuisance, not much you can do about them but. fig birds, black faced cuckoo shrikes and crows along with common koel's aka storm birds, king parrots as pretty as they are and as friendly as they want to be don't attract them to your place by feeding they will decimate all fruits including tomato's.

then there's the flying foxes.

with frost if any might mean some plants need covering until they reach about 1.7 meters high the wind will be no worry and when they grow the could all act as wind breaks. and if you do get frost a large orchard will bring the temp up that degree or 2 and maybe the frosts will be no more?

would suggest plant along the contours and use heaps of mulch, around the new plantings and between the rows, you may benefit from doing some rip swalling to allow more water into your sub-soil best to do this before planting and mulching.

len