Country: USA
Room: Kitchen
Level: Warp Factor Full Power
When lining up to tee off, you're facing straight into a microwave warp. Go ahead and play the level but make sure to reveal the bronze money flag (~$60,000). When your smashbreaker starts to run out, head over to the first microwave and try to line yourself up for a pistol putt into that microwave.
Upon putting into the warp, the ball will exit out of the other side, and bounce back by the finishing hole, then roll into the bronze money flag, unlocking the achievement.
This solution worked 5/5 times for me.