Since we are in WA spotlighting for coyotes is a lot harder.  I would ignore your budget and save up for a good package, that is lightweight, and easy on batteries.  Nothing over 350,000 candlepower.
The lightforce 170's are awesome units but spendy.  If you want a rheostat for lighting them up and conserving batteries they probably have the best factory units.  The light, charger, rheostat,  battery, car charger, and carry bag will add up to about $300.