That type of policy should cover for loss of building materials in the building or within a certain number of feet of the building. 

that material is stored in unheated warehouses all the time, you can store it in the garage. as @Brad Lighthall mentioned just let it acclimate for a couple of days in the house before installing it.

Copper out last all other materials for mains, if it is a main go with copper not pex I've replaced so many pex water mains. 10 years is a short life span, the foundation could of settled and caused the brake

When buying sizeable or large quantities, I'm curious what your strategy is for negotiating discounts with your material vendors and distributors. 

Trim trees and remove weeds ($200)- Repair handrails ($100)- Paint common area stair wells ($500 labor/materials)Estimated 20 days / $4700Once Phase 1 is complete, if everything goes as planned (as it will not) we should have the recently renovated unit occupied at $600 per month, and $550 of electricity expenses out of our name.  

•Charged me $500+ in "materials" and refused to provide me with receipts and just gave me a generalized itemization and charged me for debris removal when I had done it MYSELF.   

They want a house with four walls, a functioning roof, and rough and finish materials that work.

And folks who maintain jobs and are apartment material will of course keep paying rents (albeit with some concessions, perhaps). 

If you decide to stay the course, better have a good lawyer on retainer, and even then there is only so much can be done. 

If they had already prepurchased some of the material needed for the repairs and things like smoke detectors, would they normally be able to use it on a different home or would they get upset over it?