I mostly sail solo (145lbs), and in the summers here we have a ton of extremely light wind, especially 11am-1pm. It's bad enough that I hit the beach at 11am, go get lunch, and go back out on the water around 1pm (sounds rough, I know).

When I have crew, I try to keep her in the 100-130 pound range (each) If I get this boat, I'll probably add another trapeze that runs through the mast-beam. Three under-150 pound people out on the wire each working a single sail could be pretty effective.