How do you know they admitted a 142? I'm just asking because my first attempt was not much better than that and I got denied to a bottom tiered school (that being said it was several years ago when law schools had a higher applicant pool).
You definitely need to take care of your kid first of all. LSAT can wait. You need to have peace of mind and confidence to get a good score. I withdrew in February and forfeited the fee, but I don't regret it.
i went to the one in toronto and the best part was the free application waivers. pretty much every school representative i spoke with has waived the application fee.