I work 40+ hours a week in a civil engineering company and then attend law school at night. I agree with Zemog that it is difficult to balance life, work, school, and family (my wife is "due" within the next two weeks - DURING FINALS). However, I have great support from my work and family. I think it is vital to have this support while attending law school.
Working in real estate and going to law school will be very beneficial to you and your employer. At my current job, I work with residental and commercial developers designing projects and guiding them through the maze of governmental approval. I have used my knowledge of the law (and how to find it) several times and it has greatly benefited my clients.
Also...After you graduate, you may be able to take the real estate brokers exam (depending on which state you are in). As you know, the brokers make the money!