Bizville starter checks
Library: check behind the central first-floor bookshelf. Arcade: look behind the yellow cabinet on the left. Job Center: inspect the right-hand room between the upper-right doors.
Chapter 3 train checks
Check behind the passenger bathroom shower curtain, behind the Spa Cart hot tub, and behind the Store Cart arcade machines. These are collection checkpoints, not a tested timed farming loop.
Chapter 5 checkpoint
At Trinity Castle, check behind Reginald’s seat. The reference’s full location list contains more pickups; follow its linked chapter entries for rooms omitted here.
Find and spend
I Spy, found in Bizville Arcade, gives cues for nearby BUX. Spaceman James in Bizville and Spaceman Sam in Trinity accept BUX for cards. Budget a desired card before spending.