Breast Pump

Hello mommies! Can I ask for your opinions/advises po? It’s a must po ba bumili ng electric breast pump kapag di mo naman po balak magbreastfeed ng matagal? I mean, after my maternity leave formula na kasi balak ko. Gusto ko man ibreastfeed ng matagal kaso feeling ko di ko kakayanin sa nature ng work ko. Thank you in advance!