[No fire resistance here, but if you'll all back away from the blatant trap I'm going to do a little summoning and spring it]

Vhaak then walks until he's a good 50 feet from the gold trap (or just backed up against the 'house' if this place is too small), and after waiting a round or two for the others to similarly relocate he'll summon a human skeleton and tell it to grab the gold.

"For the curious that is a conjuration spell called summon undead 1, personally I consider it much more useful that summon monster 1, if only because skeletons have opposable thumbs. I like to think of it as the sorcerer's trapfinding."

Spoiler: OOC
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That's a summon undead 1 spell, summoning a human warrior skeleton from the bestiary, it lasts 6 rounds.