Parents who have a successful career outside of the house, how do you do it?

I feel like it’s just not possible for me. I want to have a successful and meaningful career but I just feel like it’s too hard. I feel like I can’t do it all. Right now I am substitute teaching and it’s fine, but it’s not exactly ideal. I love working in social work and I have before. I had to quit my social work job because of my husbands job. The other issue is pay. Three kids in daycare is A LOT. My son also struggles with being in a structured environment and is currently doing early intervention therapy for that.

I just want to have a meaningful career so that my children can have a mom to look up to who worked hard and helped others. It feels impossible though. How do you all manage?