I realize you are excited and ready to begin, but frankly, I believe working people need to begin their salt water flush experience when they have a couple of days off and can stay at home and near the bathroom.
One alternative is to prepare your salt water the night before, set it on your bedside table, set your alarm for 4 am, wake up, down the salt water and go back to sleep. Usually, the action begins within an hour or two. You will probably have to factor in some potty time in the morning, but you should be over the worst before you leave to drop off the kids and go to work. With luck, you can have your lemonade before your workday begins and things will go pretty smoothly from there.
If you find you can't handle the swf in the early morning, then take another cup of lax tea in the AM and just do the swf on your days off. It is not an ideal solution, but it is better than giving up because of the logistics.