"Green" Building - It doesn't get any "greener" than Old World Italian design.. From sustainable materials like stone and stucco, to barrel tile roofs. Materials in this genre of design are designed to last hundreds of years.
Add to that a plan that is designed for today's life style, lots of room to enjoy the outdoors, cool breezy patios and loggias and courtyard entertaining areas and you have a very "green" building that will fit all of your needs. Spaces are designed with what is needed to function in mind without a lot of wasted space or spaces no one uses any more while allowing the maximum possibilities for activities of all kinds from formal to casual.
Among other aspects of this design that make it green are the energy efficiencies similar to a 19th century Texas "Dog-Run"... yes Dog-Run.. A Loggia connects the Entry Gate to the rear covered porches and provides a space that naturally cools the adjacent structures. Ample covered porches protect windows from a cruel Summer sun and stylish barrel tile covered awnings and small square windows, typical of an Old World structure, protect the remainder of windows.
This plan is suitable to be phased in as your needs require and starts with a base plan of roughly 3000 SF. The detached Guest Quarters and Game Room can be added later as finances or need require. This arrangement also addresses the needs of families with "extended stay" young adults or aging parents while giving teenagers a place to be loud and ruckus without disturbing the entire household.