at sigiriri,i have experienced both sides,i.e. cooking and eating at mess i noted the big change in my budget.
considering breakfast,lunch and supper,most students spend kitu 90-130 per day.in a month that is 3000 plus.
if u cook in ur room,stima ni free.just buy cooking oil,salt,royco,rice,unga,sugar in bulk,trust me u will note the difference.