Bose Compact L-1
If you need more than one mic and one line input, also pick up a mixer such as one of the Beringer mixers at low cost and fairly good bang per buck.
The Bose Compact L-1 is spot on for what you need, easy to pack and carry, easy to use, does not need monitors at all, can handle the crowd size easily. Price is right at $999.00 US for the Bose. Add another 50 to 100 for that mixer and then the cost of mics and you are good to go praise and worship!
And you will enjoy world class sound without having to learn how to be an acoustics and electronics engineer.
--Mac
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"Keep listening. Never become so self-important that you can't listen to other players. Live cleanly....Do right....You can improve as a player by improving as a person. It's a duty we owe to ourselves." --John Coltrane
"You don't know what you like, you like what you know. In order to know what you like, you have to know everything." --Branford Marsalis