I've not been a fan of bushfire bunkers. I think that if you cannot defend your home you should not be there (leave early meaning prior to 10AM before there is a threat). But, living in a bushfire risk area, and given recent credabile information we are now looking at a bunker as a backup / last option. There are a few bunker options on the market but a couple that I find 'interesting' have emerged (I'm not an expert, just my opinion).
Interesting options (with very different pricing) are:
* Wildfire Safety Bunkers
* MineArc Bush-Fire Chambers
(Wildfire Safety Bunker image shown)
A bunker approach does worry me. See my notes here.