From the above it seems you have decided to go from a dual income household to a single income household - which is quite common.
I'm sure it is different from that but it does not seem the total jump of live of property income.
That's a good point. I guess WM's family has the safety net of the hubby's income to fall back on. The income can still be used as servicability for the financing.
Not as risky as the single bread winner retiring from job/business for the family to live off property investment.