Well, about €1100 is considered the minimum for an adult living alone in most municipalities. It should cover all living expenses. That sum is made up of unemployment benefits (minimum, not the temporary means tested), housing benefit (maximum allowed or about €316) and income support around €200. The typical cheap studio apartment can be rented for about €400 given and take or so €100 in most regional capitals. The cost of food is highly variable as it depends on what you eat but for a single adult €200 should be enough.
If you've paid the mortgage off, then you'll still be left with maintenance costs that would not much less than the cheapest rents.
NB I did only say 'towards a living wage'! $600 isn't that far off.