I need advice please!!!!!

I had planned on staying home till my baby was two but an old boss called me and made me an offer I can't refuse. so here's my question/problem: I don't want our bf journey to end, I plan on nursing during the day and trying to pump bottles for my husband to feed her at night but I'm scared my supply will drop or a pumping schedule will just be too much. with the type of job it is I'll only be guaranteed a 30min break and even then it may be hard to pump. how can I keep up my supply and any pumping advice because at night I barely get 1oz out.