If you are looking for A-licensed, 1st team, DA level coaches at the high school level - You'll be very disappointed.
Practice or games 5x per week (during the day when a normal job would typically require you to be present). The pay is only about $5k for the year. (Which includes summer league, 6th period "soccer class" and all of the extra curricular things that happen in high school sports).
You'll find 1 of 3 types of people as a head coach in high school soccer:
1. The math or gym teacher who doesn't know much about soccer, but the school needed someone
2. The local club coach who loves the game. But also knows that coaching at the HS will bring more players to his club program.
3. A retired player or club coach who wants to stay involved in the game. But is sick of the Club soccer BS that goes on and is coaching to stay involved.