Why do you like that one?
Profit motive. We can get there for much less energy expenditure and odds are we'll be able to find something someone can make a profit from. That will guarantee a vibrant space industry.
Larry Niven has a lot of neat short stories in his Known Space series that deal with the possibilities. I also read alot of Gerard K O'Neill's books, papers and articles about L5 and related industrialization of space (even got to talk to him for about 1/2 hour when he was stopped over in SF many years ago and visited the store where I worked - he was shocked someone recognized him!).