Something I do when I'm playing a character that can't (or shouldn't) buy food is to go someplace that rangers rank and collect the steaks.

I'd say if the MUD has been up for more than a few hours there is a very good chance that after checking 2-3 areas (like the Forest of Nowhere) you will have a container full of food that ought to last a few RL days.

Another option would be to just go ahead and play a ranger which by the late teens can supply itself with unlimited food and water. Added bonuses include an excellent ability to solo, some self-healing and possibly curing, and of course stealth.