Pinkfish, you should be able to get not but, but 3 master builders... Could it be possible that you're trying to build everything so fast, you're putting too many people on projects, and therefore spreading the skills thin? Try concentrating on just 3 people as builders for the first swathe of building projects, even if it takes longer to get them built.

And no.. you won't have to buy it again.. the update will be free