Thanks @Owlunar I haven't got as far as any further discussions with my neighbour yet.
It's colorbond that she wants, to replace the 45 year old Jarrah fence. I'm in agreement on that, because it's actually the cheapest, most cost-effective replacement option.
No one puts in Jarrah anymore, it's far too expensive - although the only reason that it's lasted so long, is because it was Jarrah.
Jarrah is so hard that termites blunt their beaks on it, when they try to chew it. Termites can only get into it when it's very weathered, or rotten.
What I don't understand is that my neighbour lived in her house since new (45 years), & has not repaired or replaced anything - it's all very run-down, & worn out. Now suddenly she does seem to want to fix or replace things.
Then when I came along, I seemed to be given the bills (& responsibility) for repairing 45 years worth of neglect...
I moved into an old house, I didn't have the pleasure of living in it when it was new (or of having everything new).
Adge
