I worked 40 hours a week and full time undergrad and grad school. You work, go to school when you aren't working and when you aren't doing either of those, you sit in the library and study.
My wife is currently finishing her masters while working 40 hours a week and still being a mom. It's very stressful, but she's killing it. One of the harder parts (aside from the long nights) was finding an internship that was flexible with her schedule.
It's completely doable. My mom went back to school at 40 and retired in her 60s with a Masters. Was it hard on her... yes. Most things worth doing take hard work.
A lot of people always find a way to blame their issues on something external. Oh it's too expensive! Oh there's not enough time! Oh someone should do it for me! Oh that person just got lucky!
Maybe some of that's true, but it doesn't really matter. Take the cards you're dealt and do something with them. Or.. you can just fold and keep blaming it on something else.