A 119A No.

Cunning Brilliance lasts for 1 minute, once per day. The minimum requirements for item creation are as follows:
Quote Originally Posted by Dungeon Master's Guide, page 283
The character must spend the gold and XP at the beginning of the construction process.

The caster works for 8 hours each day.
Quote Originally Posted by Player's Handbook, page 88
Time: The time to create a magic item depends on the feat and the cost of the item. The minimum time is one day.
A 119B

The required costs must be paid ahead of time (i.e., spend the XP and use up materials as specified for the item before any creation work is attempted). Then the necessary conditions must be met for the time required (required item creation feats, access to a laboratory or magical workshop, and so forth). After 8 hours of work each day, any needed checks are made. If multiple days of work are required, repeat for each day.