FREE: Wanted: leftover insulation & drywall

Looking for any amount of new or new condition insulation, drywall and plywood. Looking to turn an unlivable space into a affordable rental for low income renters. Could pay small amount or trade labor of some kind. Able to pick up, trying to help homeless relatives with a place to live on our property but we are far from well off and hoping someone may have some extra supplies they're willing to part with for a good cause. Or even good condition used supplies. Appreciate your time reading this.