We removed a chimney to open up the space and updated all the major ticket items—new electrical, HVAC, and roof.

What I do for my units with shared meters is I charge 50% flat to each tenant which prevents waste I get no issues with any waste due to this but the ones that share electric bills do get many complaints due to the size of the bill.

If you open up the wall to do something, you will need a permit for plumbing and electrical a lot of the time because they will want to see behind the wall before you close it.

The main reason/difference between this and the delivery of electrical energy is that the losses of transmission of electrical energy are generally less than 1-2% (that's why we use electrical transmission methods over long distances, generally speaking). 

Since most of the homes that flooded took on electrical damage, you will almost certainly need to file a permit to do renovation as you will need the electric company to shut the power off, provide temporary meters, and turn the power back on.

In the 80's the electrical grid from Oregon to Mexico went down, and it was chaos for a few hours.

Here are a few Walmart deals that I found that could be useful$15 - Chefman Rapid Boil 1.2L Electric Tea Kettle - https://www.walmart.com/ip/Chefman-Rapid-Boil-Glass-Kettle-1...We have this kettle and it has been solid for 2 years now.

I am getting a lumpsum estimate for things like electrical, plumbing, but I am not sure what the cost is for. 

Custom built closets NO wire closest.. lights in the closets upgraded electrical etc etc.

And people who claim $0 investment must not have an electric bill like mine was.