Approval took a while: first - the Plans Examiner sent them back, requiring that we specify fire rating of materials because they want to ensure a fire in one unit will still allow the occupant of the second unit enough time to escape the property.

In California we Pre-Lien every time we start a project.We always inform the home owners that is not a Lien or even a attempted to Lien, but that its only to follow the letter of the law and be able to protect all parties involved which in most cases includes the Material Vendors.You'll be fine.Live and Learn.Cheers

Layout and materials are the same as what was there before.

Why are they letting tenants handwrite modifications to material terms?

He needs to have connections with other trades in the area, vendors, etc.Last piece of advice, make this person get all supplies, materials in his or her name, not yours.  

You could even review the material in the AdWords certification program (all free now).

In my opinion if you have mold below grade it often requires a lot of water remediation, gutting of all material and then still crossing your fingers. 

Easy to repair or replace, don't make it too nice or you'll be paying high dollar all over again after tenants trash stuff, use rugged materials.

So i would read the laws not just educational material. 

MF unit builders typically build the cheapest materials they could find, something i was bidding on a 56 unit townhouse. they don't put anything fancy. that's why clients want to tear it down and put their new stuff in. half of them, they sell it only with drywall up.