He 'retired' (as in, didn't have a job but spend most of his time DIY'ing so he didn't need money - not quite my definition of 'retire' but let's not beat that dead horse any more) years before the blog, but now brings in 6 figures (maybe more by now) from ads & other website income. It's a bit a 'in a gold rush, those selling shovels do best' thing.