His quote was 1300+materials.

Hi @Matthew Maggy,I've never done this, but it could work, as long as your building/walls don't expand and contract to much.As @Art Allen said, you could use an edge bead (commonly called "L" metal or bead around here) at all joints with the existing walls/ceiling.

I have bought a lot of things from China but you have to be very careful in regards to quality and type of materials.

Is your 1:1 ratio of materials to labor accurate for the work completed? 

Property also included a 30x60 metal building.

(A) A landlord who is a party to a rental agreement shall do all of the following:(1) Comply with the requirements of all applicable building, housing, health, and safety codes that materially affect health and safety;(2) Make all repairs and do whatever is reasonably necessary to put and keep the premises in a fit and habitable condition;(3) Keep all common areas of the premises in a safe and sanitary condition;(4) Maintain in good and safe working order and condition all electrical, plumbing, sanitary, heating, ventilating, and air conditioning fixtures and appliances, and elevators, supplied or required to be supplied by the landlord;(5) When the landlord is a party to any rental agreements that cover four or more dwelling units in the same structure, provide and maintain appropriate receptacles for the removal of ashes, garbage, rubbish, and other waste incidental to the occupancy of a dwelling unit, and arrange for their removal;(6) Supply running water, reasonable amounts of hot water, and reasonable heat at all times, except where the building that includes the dwelling unit is not required by law to be equipped for that purpose, or the dwelling unit is so constructed that heat or hot water is generated by an installation within the exclusive control of the tenant and supplied by a direct public utility connection;(7) Not abuse the right of access conferred by division (B) of section 5321.05 of the Revised Code;(8) Except in the case of emergency or if it is impracticable to do so, give the tenant reasonable notice of the landlord's intent to enter and enter only at reasonable times.

He provided me with a material's list and wants me to purchase the materials for him to use.

And a big part of that has been the wholesalers who are transparent in their dealings, contracts, website, and promotional materials.

That got me thinking about all of the materials I will be purchasing over the year.  

The exposed brick was not planned, the plaster wall & metal lath was crumbling and the furring rotted!