Without knowing your situation, this is a short in dark but....

I think you have a worthwhile cause to start the project. But I'm not sure about the choice of equipment. With so many subjects and the scale, the cost of just purchasing the film will be enormous. On top of it, all the chemicals and time involved can be overwhelming. To me, it sounds as if medium format or even 35mm would be sufficient or even preferable for bulk of the shots. You could use LF when needed, but using it for all shots may be unnecessary.

It would be sad to start something like this and not being able to finish it because of financial or time constraints, or because technical aspect of the project became overwhelming.

Just my thoughts....