One of the easiest and most cost effective ways to produce multiple backgrounds from a single light source is to use photo gels. These handy little pieces of transparency can take a white backdrop from white to any color backdrop you can imagine.

Take it one step further and run a color transparency through your handy printer and you can get patterned backdrops. Ebay is definitely your friend on this one. I've listed a few of the better deals out there below:

CORDLESS L.E.D. VIDEO CAMCORDER LIGHT (HOT SHOE MOUNT) BATTERY OPERATED-NOT HOT    US $45.00

860W STROBE STUDIO FLASH LIGHT KIT LIGHTING PHOTOGRAPHY    US $410.00

Complete 3 Strobe Flash Light Softbox Umbrella Backdrop Kit Photography Lighting    US $302.95

900W Professional Studio Lighting Kit 3 x 300ws Studio Flash/Strobe    US $356.60

900w Photo Studio Mini Flash Monolight Kit Carry Bag D    US $499.99

VIVITAR FLASH 283 Armatar UNIT W/ EVERYTHING 200 W PORTABLE Flash-UNIT Complete    US $525.00

90WS Starter Flash/Strobe Lighting Kit NEW NR    US $119.00

Photo Studio Flash Strobe Light Lighting Wireless Kit 900ws Total    US $655.73

Chauvet LED PAR 64-36B 3 Or 7-Channel DMX-512 LED Par Can DJ Light    US $249.99

Chauvet LED PAR 56-24-B 3 Or 7-Channel DMX-512 LED Par Can DJ Light    US $199.99