Which breast pump should I get?

I’ve narrowed down my options for a breast pump through insurance and need help! I’m planning on pumping for the majority of feedings because we will have to send our baby to daycare at 10-13 weeks. I work from home, so mobility isn’t the biggest factor, but I do like the idea of not being tied to an outlet all the time. This is our first child, so I’ve been doing a lot of research but truly have no idea what to expect.

I’ve heard a lot about the Spectra S1 and how great it is, but I’m just debating if I want to spend $70 on it or take advantage of one of the free ones.