You can do several different Law degrees online via correspondence, which means you can take your time - you have up to 10 years to finish the degree.

FEE HELP will pay for the fees, books etc are on top and your expense.
You can get AUSTUDY - but this is means tested, so DH's salary comes into it. CL are fabulous - they force mothers to get back into the workforce, but won't support you to study to go back into the workforce qualified if your husband is earning too much money... Stupid.

Anyway, it is tough to juggle everything, but that is why I am doing mine online, means I am at home and have no issues with all that.

Good luck!

ETA: You need to allow about 10 hours a week per unit of study. One Unit is part-time, 2 unit are full time, per term.