Originally Posted by sfisch
You also want to add in at least 1-2 hrs of resting time for that brisket. Very important.
totally agree. Hard to get to 7pm dinner with this math. I would try to do it overnight low and slow (like 250) and hold it in a cooler after you get home from work.
If not, you are going to have to get up really early and trust that you can hold temps in your absence and in cold weather.
You are pushing it. I've done it many times and it can be more frustrating than it's worth. On the other hand, if you nail it, happy new year to you.