When the invoked manifestation of Neil's mom vomits all over Neil's face and head, his head and hair is miraculously dry and clean in the next cut within the same scene.
It's not clear why, if money is really 'no issue' to Neil and Iris is just looking to make a profit, why she doesn't just sell him the pub entirely. This would give her the money whilst Neil would have unlimited access and control to Baghead.