DSD1 has them currently. Cost about $6500 but DP gets about $2k back on private health for his half share.

DSD2 will need them too at about same cost.

DS1 may miss out because his teeth are looking pretty good at age 10.5.

DS2 needs them (age 8). Haven't got a quote yet.

My braces and ortho treatment was $10.5k in 1996-1998 but was with a top orthodontist who only took the hard cases. I had a 1.2cm overbite. My wisdoms came through fine though. My brother's cost a bit more but he had jaw reconstruction surgery as well. He had a narrow upper jaw and wider lower jaw plus extractions.