To determine the value of an educational investment, you'll need to determine your earning potential vs. the cost of a graduate degree.
Some things to consider so you can make this dream a reality:
-Most importantly, have clearly defined plans/goals in place for the duration/completion of this program. Remember, this is an investment in yourself. Investments can turn out poorly, so all we can do is try to minimize risk as much as possible.
-Research the required courses and upcoming schedules to get an idea of the typical course load (help determine if you can make time to work around studies)
-Attend part-time in an effort to keep up with tuition expenses
-Research career opportunities at the school itself to help with work/student balance - (ie: assisting undergrad professors)
-At a quick glance I'm not seeing online opportunities for this program but research for yourself to find out. Even if there are just a few opportunities online, that could greatly help a work/student balance.