Either Feast or Famine
DEFINITION: A situation in which there is always abundance or insufficient resources.

EXAMPLE: Being in the entertainment industry, it's always either feast or famine. Sometimes you work 18-hour days; sometimes you have months with nothing to do.
"Thank you so much for the polishing suggestions! I was not impressed with the work done on the résumé in the past. This looks so much better! "
Marcia Veatch
Iowa City, Iowa