How Long Before Someone Shoots?

From Florida Statutes:

776.013 Home protection; use of deadly force; presumption of fear of death or great bodily harm.

(1) A person is presumed to have held a reasonable fear of imminent peril of death or great bodily harm to himself or herself or another when using defensive force that is intended or likely to cause death or great bodily harm to another if:

(a) The person against whom the defensive force was used was in the process of unlawfully and forcefully entering, or had unlawfully and forcibly entered, a dwelling, residence, or occupied vehicle, or if that person had removed or was attempting to remove another against that persons will from the dwelling, residence, or occupied vehicle; and

(b) The person who uses defensive force knew or had reason to believe that an unlawful and forcible entry or unlawful and forcible act was occurring or had occurred.

There are then some exceptions noted:

(2) The presumption set forth in subsection (1) does not apply if:

(a) The person against whom the defensive force is used has the right to be in or is a lawful resident of the dwelling, residence, or vehicle, such as an owner, lessee, or titleholder, and there is not an injunction for protection from domestic violence or a written pretrial supervision order of no contact against that person; or

Nope. The bank and it's contractors are not the titleholders. They have not foreclosed and obtained title nor a writ of possession.