9 month old barely nurses

My 9 month old only nurses maybe 2-3 times a day and only likes one side. I do offer before solids, but he will just bite me if he doesn’t want it. He would much rather eat solids. I’m worried that when I go back to work next month I will not make enough to send to daycare. Advice? Also, how much breastmilk do you send with a 10 month old to daycare?