A lot of photographers use the paper backdrops. They are about $70 which isnt too bad except that you go through them pretty fast & it can start to add up. Especially with white ones! Heres something I learned from a very successful & large studio....use linoleum. You can usually find some uglier rolls of it on sale at Home Depot or Lowe's & a lot of times they have stuff called Contractor Rolls which is really cheap.
Go to the paint section & buy a can of Satin White paint (I like Satin because Flat gets dirtier faster & glossy is too shiny with your lighting). Take your paint & paint the back of the linoleum with the white paint, let it dry then roll it up & store it until your ready to use it. Keep your paint & as the backdrop gets dirty over time you can re-paint it to make it brand new again : )
To store the backdrop Id buy some pvc pipe the length of the linoleum. Duct tape the top of the linoleum to the tube so that it keeps it straight & when your done using your backdrop you can roll it up. You can also find cardboard mailer tubes or larger pvc to put your backdrop in to keep it clean when you arent using it.
Crepe Paper & Paper Decorations