Depending on landlord-tenant laws in Florida before January 1989, Blanche most likely bears the ultimate financial responsibility of providing the other three girls a new roof since she is the landlord and homeowner, so they would have no incentive to chip in on a work of art by Jasper DeKimmel in order to pay for it.
Blanche describes a piece of Jasper DeKimmel's on a brochure as nonrepresentational art. Less than ten seconds later, she starts pointing out elements of said piece as representing, signifying, or standing for certain real-life things.