Not lifestyle for me, but it is likely not actually that different from possible rents in any bigger cities. So it might work for year or two. And after that, just get a real place.
You probably have to add to that the cost of eating only at restaurants (either on board or at or around train stations) > 90% of the time. And I wonder how he gets his clothes washed (and dried). Laundromat? Stop by his parents' place? Maybe I should read the blog...
The article says he often eats (for free) at the 1st class lounges at the train stations