By the time the bounty is up, the three existing close votes are likely to be expired. It seems like it would be in the OP's interest to migrate the question to where it belongs. Does the bounty prevent the question from being properly handled?
Flag for moderator attention, and in the "other" box state that it's off-topic but you can't close it because of the bounty. If a moderator deems it to be off-topic, they will remove the bounty and close the post.