I know the OP wasnt about the project particularly but looking at the photos it's obvious they have bitten off far more than they can chew with the size of this project. You can build an assembly hall with volunteer labour, but it wont scale up like you think into this sort of build.
All the talk of redoing parts of it an wasted man hours and materials is the result. if they were paying for labour there is no way they would allow untrained amateurs with paint rollers to slowly and poorly apply a vapour barrier to the building for weeks on end. There must be 1000's of similar examples in the build.
Having them work thru the snow and worst of the winter screams cult to anyone watching it.