With that comes knowledge of the law, experience, skilled screening and selection, established policies and procedures that prevent problems or nip them in the bud, professional marketing, and so much more.

It really depends on the condition and if the person smoked indoors and was a heavy smoker.You are going to have to wash all of the surfaces with TSP, chances are you will need to repaint (especially if they've been there for 10 years) and may need to stain block the ceilings before painting. 

Also, I lack familiarity with the construction loan process and what protections that may be in place (if any) to prevent FIG and their builders from going over budget on the project. 

Many prefer white because it looks upscale and like a nice hotel, but lots of hosts have been moving to light gray to help with the staining and spots that can occur.

Whereas where you are located (California) accepting partial rent prevents you from proceeding with eviction. 

I figure a one time expense to prevent major water bills in the future might be in my best interest as long as it doesn't cost too much. 

She apparently paid someone 350 to remove a small stain in a sink.

Doing the above probably doesn't solve this directly, but by removing and reattaching all the balusters the connections are tight and the glue joints are solid...if that's not the issue then you may need to introduce some other improvement to prevent the wobble.

@Sung H Kim Depending on your location netting will likely be required at least on both sides of the range to help prevent balls from straying.

It appears they tried to remove the stains, but they are still visible.