If you love at home entertaining, even unexpected guests are usually welcome for you. However, you may be tight on funds and maybe even space is even tighter, but you want to be prepared just in case you have an unplanned chance to host a few or many people. Of course you can order a pizza or other takeout/delivery snacks, but that lacks a personal touch. And BYOB after college can be seen as gauche.
These items are so simple and easy to keep around that they create the illusion of going to trouble for company, even though these tips are not too time-consuming. Your guests are probably more interested in spending time with you and may not immediately care that you are prepared, but they will notice that you care enough to make an effort.
Here are some consumable items to always keep on hand (without breaking the bank nor taking up too much space) for welcome, but relatively unexpected guests for affordable entertaining at home.