Foreclosure property offer questions

[Fareed Zahid]

This property has a lien of $155k and a zestimate of $488k. It is scheduled to go to auction on 4-12. https://www.zillow.com/homedetails/7-Monroe-St-Yonkers-NY-10710/32991425_zpid/ Would anyone be willing to explain: 1.) At what point it would've been ideal to reach out to the owner to discuss an offer to prevent foreclosure? 2.) How long before an auction would you say the cut off time is for reaching an agreement...or can a deal be struck up until the day before an auction? 3.) What would be a reasonable number to offer? Obviously the outstanding liabilities, but how much would you offer the owner on top of this amount as cash for them to walk away with? Is this where you'd apply the 70% of ARV minus rehab and expense to reach a suitable offer number? This is just a random example, thought it might be easier to explain/understand with an actual listing to analyze. Thanks for the help.