I have about 12 cloth diapers and covers, and for my 8 1/2 month old it takes about a day or two to go through them. My cost efficient method is to just put the dirty diapers/covers in a plastic grocery bag, twist the top, and put the bag upside down (twist down so it doesn't unravel). Whenever I need to change Kylen's diaper, I just open the bag and pop it in, then twist to close.
That way it keeps the odors in the bag, and at night when I wash his diapers, I just dump the contents of bag in the washer, throw the reused plastic bag away, and start up the washer.
An additional, unsolicited tidbit my mom shared about washing the diapers: wash each load of diapers twice with hot water. The first time with soap, the second time to get an extra rinse (you wouldn't believe it--the second/rinse "wash" looks like the first one it suds up so much!)
*Chassidy