How many hours do you attend school in a week? And how many hours do you work a day and throughout a week?
The honest answer is you just do it. The last two years I averaged maybe 23 units and went 7am to 10pm MWF with an hour break. The other days I worked construction from 6am to 3. Also had marriage and daughter during this and worked on the side on Tues/Thurs at night giving the GED.