There's no other way to get to the top of the hill? You mean you're literally trapped from all 360 degrees? I could see that being handy during a siege but that appeals to a very small market really
https://en.wikipedia.org/wiki/Doomsday_Preppers
Yeah I knew someone that had a place in Goodna and it was hit by the flood badly. Coupled with the bad rep in terms of crime...well let's say it's not where I'd be looking!