I hear where you are coming from! As a restaurant manager I freqently would not get home till 2am...cant really go "lie down" at 10 pm..and let's face it, I enjoy eating dinner with my family on my days off..
So I did an AM flush...I DO NOT recommend it in any way unless its an emergency...no results for days..felt VERY crappy..and that was the only time I felt really bad during a flush.
I do continue to flush overnight, as inconvenient as it may be ..because that gives me better results. I also fast on flush day. Best of Luck!!