Something that has bugged me (but not enough to consider it a deal breaker) is that when Skyler pays Benneke's IRS debt Walt says it is all the money he has from cooking. I think it was $600,000. How did Walt get 80 million dollar so quickly then and was he lying that $600,000 was all he had saved?
He made most of that $80M at the end of the first half of Season 5. After he had taken over for Gus, made the distribution deal in Europe, then did that huge string of cooks in the exterminator tents with Todd.