The second chain hoist came today, so I got them rigged up and ready to go for tomorrow, when several friends are coming by to help erect the wall.
After some consultation with friends of mine who know about such things, I was able to find an ideal location for the hoists. I hung them using slings which hang from the main rafter.
The pull chains are 20ft long, so we should be able to pull them comfortably from the floor away from the wall.
I built a simulation of the wall lift, and I expect to get the wall to about a 45º with the chain hoists. From there, we will push the wall the rest of the way with boards and people-power while letting out the chain hoists slowly.