Here is my schedule when I am not busy (saturdays, sundays and days off):
3 am - 6 am : 3 hours ; 9:30 am - 12:30 : 3 hours ; 3:30 pm - 7:30 pm : 4 hours. With additional 10 mn after each session for metta bhavana = about 10 hours altogether
In the worst case (extremely busy day) it gets down to:
3 am - 6 am ; 6:30 pm - 7:30 pm
On average, I meditate 7 hours a day. I consider extending it to 8 by waking up at 2 am instead of 3 am and meditate early in the morning for 4 hours instead of 3 hours previously. But it might be difficult because I am experiencing very deep burning sensations from inside these days.
I have no family and I stay home all the time. I get out only for work or to buy groceries.