Cameras are mostly to secure materials and equipment.

David Green's podcast when they discuss the repeat processes @~58 minutesThis lead me to buy BRRRR book and ultimate content package, which is awesome and spurred me on to finally refinance a duplex we bought and renovated.  

We've found that a typical SFR for us costs about $8 to $12K for materials to put it in order with us providing all the work.

When flipping using the brrrr strategy should you get your contractor License so when time to buy material you can purchase them your self with the contractors discount at Lowe’s and Home Depot for cheap?

I'd call your insurance company and make sure the package you have works for you. 

The cost to gut a house with asbestos in the plaster, linoleum and roofing material can be $60,000 to $100,000.

Since this is a package deal with one mortgagee I would prefer not to burn $43k over the life of the mortgage (30 years) just for loan servicing! 

There are several specifically for real estate (and there are packages for podio to do the same, for cost and for free). 

The listing shall include the name of the material supplier and/or sub-contractor, amount of payment, payee address , corresponding cost break down line item number.

If any of those tenants goes into default or moves out before close, you could argue that is a material change to the property and be allowed out, but again, that would be an attorney's call and likely some legal fees.Lastly, you could always just have your realtor send a cancellation of contract form, and see how the seller responds.