Autographed cards

A friend of mine is trying to put together a complete set of autographed 1968s (at least I think they are 1968s). Its something that I always wondered about  -how does anyone chase down the gold insert sets, or the Target Red sets, or get a full autographed set?

Obviously money is a key player, but it is time and dedication well beyond opening pack after pack to collate a 2016 set.

I was amazed to discover you could collect *this autographed set:
http://www.sportsartifacts.com/aagpblcards.html

Impressive.