Sorry to see you didn't get any responses last night. There are very few on this forum right now. Sometimes you'll see dozens of posts per day. I think many people are waiting to do the cleanse in January.
I have been drinking my SWF by 6:15 in the mornings and am able to leave the house by 7:45 (barely) to go to my yoga class. So, I'm pretty sure that if you drink yours at 5am you should be ok by 7:30. Given your circumstances, though, this weekend will be the best time to try the SWF and keep track of how long it takes until you have your last "flush".
I hope someone can answer you about detox symptoms. I've done the cleanse several times before and I rarely have any major symptoms. Right now my rosacea (pustular, papular = nasty in my opinion) seems much worse and I'm hoping that's a detox symptom and that this cleanse will help. I'm on Day 4 and feeling good. I've seen people on this forum suffer through all kinds of severe detox symptoms. The people who have stuck with the cleanse throughout the detox have always been very happy they did. Huge sense of accomplishment and huge release of toxins which not only helps you physically, but emotionally and spiritually as well.
Hang in there - we're all here for each other!