Iím part-time starting my fourth year of law school. Iíll try to give you some insight. I donít work fulltime however, I have a small business and a PT clerk job but even those donít amount to 40 hours a week. So my advice on what its like to go PT and work FT comes mostly from the experiences of my friends at school, the majority of which work fulltime.
You wonít need to study 14 hours a day, but you will need to spend the majority of your free time studying and reading. And when exams come you should take your vacation time because you will need to study fulltime for the 2-3 weeks leading up to exams. You will likely need to spend most of Saturday and Sunday studying and probably 2-3 hours a night 4 nights a week after class studying. These are rough estimates, its really going to depend on how disciplined you are (ie. No procrastination) how quickly you read and how quickly you pick up the subjects. This is just for the first year, itís the most time consuming by far because your adjusting to everything being new.
Your free time and thus your time with your family will be severally limited the first year, not quite as bad year two and by years three and four you should have much more free time (because by then you know how to ďdoĒ law school well enough that your must faster.)
My friends still have time for their families, but they put in long hours and work smart 100% of the time. The first year is going to be rough, and will likely put some strain on your relationship (this has happened to all my friends, but no one has broke up or anything) Both you are your partner will have to adjust to the law school thing, its takes a toll on both of you. Your partner is going to have to step up and take on more of the rolls you did around the house in the past because you need all the spare time you can get for school. Itís a team effort.
All that being said, law school will also be one of the most rewarding experiences of your life. I have met the best friends I have ever had in law school. You bond because you are all going through the same thing.
Anyway hoped this helped describe it somewhat.