24/7 coverage 365 days a year at 20$/h = 175,200$/year.

>Junkies will find ways through the fencing at night

Your math implies polar winter. Solar would be a bad investment.

	▲	Retric 26 minutes ago \| parent [-]
		You can’t assume behavior is unchanged when you change the situation. In remote areas if you only guard at night they will go in the day.