Help sourcing material?

[Cameron Adams]

Has anyone had any any luck buying material in bulk? I'm getting ready to build a 18 unit multifamily and any cost savings would really help. I've been looking at some bulk material on alibaba but it all seams kind of sketchy. Any ideas of how to source goods for less money would be great. Websites, catalogs, companies, trade shows to me vendors whatever. I currently buy a lot of stuff at Home Depot and I'm already one of the top purchasers at my local store but I feel like they don't give me a very good deal.