Dumb question: with the (say) Ubiquiti gear, can you create a "corridor" of wireless coverage following, say, the Collingwood to Bainham Road along the Aorere Valley? I get that you can do point-to-point relaying, with pairs of Rocket M5s for example; presumably there's a way of getting coverage to an area of properties, and not just from one place to another, right?
Short answer is yes.
Longer answer is that you need to pick the right bit of gear for each bit of the network, but you're thinking in the right direction in my view.
As for MiniDSLAM's... I've been looking at those too. They're getting cheaper and cheaper.
I'm looking at those for my area where 30% of homes at my local school aren't connected to the internet.