Agreed.
We have $5M+ in loans and about a $100K buffer.
5m x 7% = 350k pa = 30k a month. Therefore 3 months buffer, in the event that everything went vacant and you & partner both lost jobs.
I prefer to think in terms of X month buffer rather than $X. If the same duration of buffer can be maintained throughout the journey (or perhaps increasing in line with the debt), that's ideal, right?