Henni,
I concur with Don's observations - the outdoor coverage is phenomenal. I used a single L1 system with a single B1 sub, played at the Aberdeen Municipal Park, where I did a 2-hour concert. I had people 600 feet away dancing and they said the music sounded great. Yet, the people that were just 15 to 20 feet away said it was not too loud and that I was the first performer they could make that statement about. The standard L1 system is just awesome, but for the jobs I'm currently doing it was overkill.
My daughter attends a church near where I live and they have an incredible Bose sound system and the area it covers is massive. I'm confident the church would easily seat 500 to 700 people. Their system consists of 4 L1 type columns, two on either side of the stage, plus a pair of B1 subs that are on the floor, one on either side of the stage area. With the master volume turned up to approximately 1/4, the entire church, including adjacent rooms, is filled with incredible sound.
I don't know if these systems are available in SA, but I would think there would be outlets in some major cities.
Good Luck,
Gary (The old guy!)
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)