Problem is many have rose-colored glasses and will call a neighborhood C, but it is really a D - just because it seems there is even worse...I think the best definition is the A and B are above the median price and C and D are below.

So by putting everything down on paper, you can easily correct the client and keep things moving.You mentioned timelines....those are hard to get everyone to agree on in the original contract because a Contractor knows that a customer nowadays will start changing things as soon as they watch that episode of HG TV with their glass of wine.I included on my Change Orders a line to add time to the project in addition to the added dollar amount.

Also you have to be aware that some of the "wholesale" deals were actually purchased off MLS and just recycled with that marketing term. 

Phenomenal CoC returns, recycle your money, ability to scale, etc. 

bondo glass" (also polyester resin, talc with fiberglass cloth strands) & similar is the "lowest" group of products I would even remotely consider for exterior/occasional water exposure.

Usually paint the bathroom in recycled glass color. 

Make sure to analyze any deals with a magnifying glass and have as much accurate numbers as possible with any renos etc.

Use the magnifying glass on local FB groups and search for "housekeeper" and also use the enemy method. 

You need to buy in cash and you need to rehab in cash and then quickly move to recycle your money. 

The straw that broke the back was the tenant that destroyed a glass top stove that was part of a set and wanted me to fix it.