Webpage generation system

Have question on the complexity of setting up a section within my website which allows users to create their own websites using predesigned templates. Looking to do something similar to [login to view URL] but targeted at only one industry. Is this easy or hard to do? Any direction or feedback on this is appreciated. ## Deliverables Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. Complete copyrights to all work purchased. ## Platform web