If you want to get some insight on how the A's are forced to do it, read and / or see "Moneyball"...
G.M. Beene has had to alter the philosophy over the ensuing decade a bit, but it makes what was fascinating to take over this mess make...sense?
Look at the recent Kurt Suzuki trade:
Dump salary for a prospect is the standard...
I get rid of anyone making over 1M in the final year of their deal for "B" level prospects (or an "A" and a "C", etc.) whenever possible...
Also:
Guys in the minors seem to be "ready for The Show" when they hit 24 to 26 years of age...
Before that, they're pretty inconsistent...
Also:
Run a search on this forum for two threads:
An A's franchise thread from early in the year that has some good stuff AND a "Moneyball"/ GM thread...
Play the game ANY way it's fun to you, but playing it as Beene has to makes it so challenging that ANYTHING good that happens is a "victory"...