I have managed to get my setup time down to about 10 minutes.
Gear includes:
A-frame stand with attached mic boom
SD1 keyboard
Laptop
2 mics and cables
Bose PAS system
Rack bag with AC Strip. Power cords are already plugged in, and snake, mics cables and pedal are stored there too.

The snake goes to the Bose from the SD1 and Laptop. SD1 into Channels 1 and 2, LT into 3 and 4 (to play songs during breaks)
1 mic into XLR input on SD1, guest mic into 1/4-inch Mic input on SD1.

Take Bose PAS from bags and set up (3-5 minutes)
Take ends of power cords from bag and plug into Bose, SD1 and LT power supply.
Plug in remote to Bose and cable from Bose base to sub. Plug in pedal to SD1.
Plug in mic{s) Plug in AC strip to wall (Total plugging in 3-5 minutes)
Begin playing and singing.
Totally the quickest setup I've ever had.
Tearing down takes only a couple minutes longer, because cords must be coiled, and PA put back into bags, which isn't quite as quick as taking them out.
Everything fits on my dolly (similar to Rock 'n Roller) so there is only one trip to the van. Oh, and my stool rolls in.
DonM