That's going to be a very small set of frequent-travelling professionals. No it's not. It's a huge swath of technology workers (and other professionals) that l

That's going to be a very small set of frequent-travelling professionals. No it's not. It's a huge swath of technology workers (and other professionals) that live in cities with expensive housing. Many of the commenters on HN fall into this exact category! You're right about savings & investment income, but that won't have anything to do with your deduction status for most people.