I had great work ethic, and im extremely intelligent, but without college, I became a tradesman, had to work my a$$ off to save money, and now I'm 41, still working in that same trade, and I wasnt able to scale nearly as quickly as I would have had I stayed in school, get my accounting degree (my major at the time I left), and got a high paying job.I'm not saying that it cant be done, and I wish you all of the thick in the world, but for every Bill Gates and Mark Zuckerberg, there are a million of me.

The air is so thick and so bad we cannot even step into the property.

And keep this stain remover recipe handy: Acetone (nail polish remover) and baking soda. stir enough together to form a thick paste.

It is black in color, but the intensity of the black can vary depending on how thick the mold has grown.

Newer twin homes have double sheetrock and thick insulation between the properties, so noise issues are avoided.

I am currently in the thick of it creating checklists and trying to figure out which things to automate first.

(thick sarcasm)Well here I am finally switching over in midstride because I failed to listen to wisdom early on.

Just a thick solid sheet of plastic, 10 mil or thicker.

In reality, my flooring contractor (all hardwood floors) was able to sand the smell out of it - and let me tell you, you've never smelled anything like freshly sanded cat piss - and 98% of the stains, and put down 3 nice thick coats of polyurethane, and the smell was completely gone at the end and never came back. 

Multiply the house's length and width, multiply that by 0.93 to account for wall thicknesses etc.