Right now I find myself using the Peavey Escort system for most of my jobs. We played two nursing homes yesterday with about 100 people at each. The little system handled them with no problem. It is ideal for small to medium-size jobs.
Setup time is minimal, it has rollers and is completely self-contained. Plus it is quite inexpensive. List price is $750 and you can expect to get at least 30% off that.
DonM