I would definately not recommend doing your first Liver Flush on a week day. I too have access to bathroom at work and I am used to flushing with epsons salt alone all the time. After my first two flushes though I would not consider it - you have that much epsons that it really is a complete flush. You dont sleep particuarly well, you wake up feeling very drained, of course you are on the toilet for a few hours and its not just like doing small amounts of epsons it is more like having to run to the toilet for several hours and i tend to feel a little drained and depressed until about 12-2pm the day after.
Definately something better tried on a Friday or Saturday night to start. I would like to do them work days as I could get so many more flushes in but to be honest I just dont dare. lol