I started off using shredded paper towels, but I think they could end up being more expensive than some of the beddings I have looked into. I just bought the cage and all I need to go with it in a boxed kit, so I have enough bedding for a month or so I think. I have to go to the dentist this month, so I have to be careful with my spending. Thankfully he lets you pay half the bill for 2 months in a row.
Right now, I don't think I can afford a paper shredder. I am kind of maxed out beyond my budget already.