[header] How to care for a hamster on a small budget [title] Shop around for a hamster cage. [step] Your hamster's cage is the most important purchase that you will make because they will spend most of their time here. The cage should be at least 450 square inches. 
This will likely be your biggest expense when you first get your hamster, but keep in mind that you only have to make this purchase one time. Wire and plastic cages are the cheapest type of enclosure for your hamster.