Alachua, FL Estate Planning Law Firms & Lawyers

You are an adult, so you could be named as your mother's agent under a POA, but only if she is willing to give it to you and has the capacity to do so. Since she has already given POA to your step-father, if she is not willing/able to give you POA, then your only other alternative would be seeking guardianship through the probate court.

If the building is permanently attached to the property, then it is part and parcel of the property. If it movable, then he may still have some claim to it if he has been using it all these years or you have been paying him for the use of it.

The Will should have been submitted to a court for probate (proving), the house sold and the net proceeds split three ways.  In some states, it can still be submitted to pass title.  Without title in the name of the three people to whom it was left, it cannot be sold. The three people can enter into a family settlement agreement, submitted to the court, in which the brother can pay his 12 years of overdue rent (or any other amount) in exchange for the sisters' shares (or part thereof).