An hour a day adds up over time and if there's some feature/fitting you need in a bike that isn't available in a stock frame then I don't really think one needs any other reason to get one... and by my thinking if I'm spending 1-2000$ on a custom frame it would have to be something I'd use a lot, otherwise it'd be a really expensive sunday rider.

That being said my preference is actually used bikes because I'm cheap.