Rent 2 of the JBL PRX515 speakers here.  These are the single 15" woofer with a tweeter for the highs. These can be mounted on poles or sit on the ground. These speakers are good for your everyday cookout, birthday party and small to mid size ball room event. They can also be used as monitors for a speaking event.

The cost is $100 per day as a rental fee.

JBL PRX515

$100