You also have to immediately clean up anything that gets on them at this stage, or it will stain. 

(I've had great luck with Scotchgard on fabric upholstery...water/stains do bead up and run off. )I'm hoping professional cleaning between tenants followed by one of these treatments would make the carpet last longer and clean up better.

You may need to test for/mitigate asbestos before anyone will open up that bathroom ceiling.Next, your 6th pic shows a drop ceiling with what looks like a water stain on it.

You could roll on a solid color stain pretty quickly every couple of years to keep it from rotting and keep it looking nice. 

My tenants are leaving in 2 months for a rental property in Newark.The wood deck stain is removed in area where the tenants walk often.

There is no damage, it's water vapor not burned nicotine from smoke that stains and odor lingers.

Because once again, it's his opinion that his broken dvd, big screen tv, 8 year old bedroom suite with stained mattress and toaster oven have any value.

I can build an addition for about 120k that contains two "units" of 2bd/2.5ba each with lots of premium features (9.5' ceilings, acid-stained colorful concrete floors, radiant heating throughout, central air, LED lights, granite countertops, subway tile backsplash, carrara marble porcelain look-alike bathrooms, etc.)

It lifts the stains right out.

It's a little hard to tell from the pics, but if the windows are in good shape, I would leave them as stained.