30k HH income is actually not that difficult for double income families who are relatively well educated.

Let's take a 48 y.o couple.

If Husband is a Director at a stat board and wife is a Snr Mgr or DD at a GLC, then the husband should be drawing about 11k a month and wife is about 9k

With bonuses of about 5 months including AWS, that is 20k x 18months = 360k.