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.

Below is the language in the contractSeller's Failure to Comply or Breach: If Seller fails to materially comply with any of Seller's obligations under this Paragraph8 or Seller materially breaches this Contract, and Buyer elects to terminate this Contract as a result of such failure or breach, then the Earnest Money Deposit and the Due Diligence Fee shall be refunded to Buyer and Seller shall reimburse to Buyer the reasonablecosts actually incurred by Buyer in connection with Buyer's Due Diligence without affecting any other remedies.

Even then, I require a written agreement that explains exactly what work is authorized, what materials they will use, who will pay for it, when it will be complete, and what happens with the improvement when the tenant leaves.

The most important thing you learn in school isn't the specific material that pertains to the subject or profession you are heading towards.The most important thing you learn in school is, "how to learn".

Thanks @Dan Deppen - Just saw yesterday your movie about the Cincinnati note - Excellent material!

However, I would be inclined to tell any tenant that all or a percentage of the rent can be applied toward materials used to improve the property, - if the tenant will provide the labor necessary for improvements.   

But spent about 35k total on repairs (chose a lot of high end materials) 7.5k for bath 1, 11k for bathroom 2, 8k for backyard, 2 k for paint, 6k for front landscaping and main city line plumbing issue.

I can share some materials with you too if you're considering a Series.