I went PT this year and worked full time. It's definitely manageable but a lot of work. I'm at the top of my class, but I did everything I could to get there, reading, briefing, outlining, studying, all of it. Just don't get behind, because there is no time to catch up.
The one thing you have to do is arrange with your work at the outset to have a lot of time off at exams, it's crucial, if even for your sanity. If you add up work and school as work, I probably worked less hours during exams than during the semester, but being able to focus only on class for that week and a half was very beneficial.