Hi @Carmela Gonzales,Unfortunately it is not uncommon for the marketing materials to have lower expenses, no capex or even no management expenses (if the owner is self managing). 

A good 12k hyper heat runs about 2k with materials.

Neither of those reports found the piping material to be an issue and needing replacement. 

Plan on 5k for materials on a used 80s with soft floors and wall paneling.

Detailed blueprints, cost breakdown and material specs.

Do you all have any references for educational material on how to negotiate liens?

If both are materially participated activities, you will be able to net those activities at your individual level.

It's all awesome and actionable material. 

Newbie in NC, how is the best way to know the cost of materials when using the flip calculator.

Get a couple more quotes, plus compare material prices with some suppliers in the area  It’s hard to determine whether the price is fair because the nature of the project and the sizes are unknown.