Audrey,

My next thought, Logitech X5500. Handles without distortion 200 to 300 people.

But there is some work to be done in order to make it portable.
Five satellite speakers.
Ten inch sub.

If you do a search on the general arranger forum you will have all the information you need.

I have the sub on a small platform on wheels, similar to the wheels on luggage. No having to carry – from the car onto the dolly.
The five satellite have very little weight.

Check your mail for pictures.

John C.