Solar Energy?

Me and my husband is planning to build a new home in Austin TX and we wanted to be 100 free from electric bill using the sun energy. Anybody who have knowledge about PV, Solar Panel please I need your help.

Project Plan: 2500 sqm floor plan
5 bedrooms

What type of PV or Solar Panel Cell we need?
How much do you think it will cost?
Do you know an architect or builder who provide custom plan
Do you know somebody from Austin is using Solar Panel
Do you know local manufacturer that we can contact with?