the problem I have with assuming you eat and draining your bank account/pocket/wallet accordingly is that you cannot also assume you work and pay you so maybe you should assume the two costs offset eachother while not logged in.
Well I did say 'other things', didn't I? And we can safely assume that working at SHI is BORING as FUCK...
I envision a day were you go to SHI, and work. You also hit up Tony's, and grab a slice to eat. You go home, and adjust your personal offline preferences. Avalible to you is the option to work at SHI, and eat at Tony's. You can turn any of them off, but if you do you gotta do em yourself. So you log off, and 24 hours later your only mildly hungry because you ate an hour ago, and 120 chyen richer.
Course your never going to be super healthy if you only eat at tonys all the time, but the option to eat elsewhere isn't avalible yet because you don't know about it (you've never eaten there), and you'll never get rich on 120 chyen a day, so the incentive to find a better paying job and better food is very real.
But this is just brainstorming, so feel free to tear it apart. Obviously there would have to be some restrictions on it so it didn't get abused by people who are trying to make an easy buck and cube squatters (you know who you are), but it would solve the problem of having to eat, paving the way for fatigue, and freeing up the player from micromanaging a VERY boring process (work..... work....... work.... count chyen, search here, work..... work.......) while leaving the opertunity for the RP that would normally be generated by these places.