Moving Stress + Bipolar?

I'm helping my mother move this Friday, and the stress is already piling on. The key factor that will make this harder on her, is she has Bipolar 2, and currently off medication, due to not being able to afford it.

This happened last year as well, and she's had to move from place-to-place, downgrading each time. - It had gotten so bad that me and my oldest brother had to have paramedics come out to her home, and help her calm down.

We don't want it to come to another drastic solution. But as long as she's off of her medication, we are not sure how to keep are relaxed 'til everything is settled in her new home.

We've gathered some pals together to help with the move. So hopefully she won't strain herself as much as she did in the last move.

Any tips? Don't want my mom to have a breakdown.