Square Footage

I am attempting to use this plugin for commercial building but there is no option to put in the Square Footage that is for lease on each property. I would think this would be a no brainer to have a real estate plugin but I guess its not something people use when leasing a building? The first thing people ask is what the price is per square foot or “price/sqft” . Does anyone have any suggestions of how to add this to the search widget and admin?

Thanks