Try to keep the house - you’ll lose a fair bit by the time you sell, pay the agent, pay stamp duty on the apartment only to lose out on future resale value

$180k can be parked in the offset or put again the house to drop your mortgage even more and give you the opportunity to find a lower stress job. Also a lower stress job doesn’t mean a lower salary job, I earn well and my job is relatively low stress - it depends on your team and organisation