We all have a friend or family member who is very diligent and try to help us doing some work and saving money at the same time.
We also know that world is full of good intentions but not always those intentions are translated in a good experience.
As a result of that somebody who help us painting the kitchen picks the wrong paint, make a mess in our house and takes several months to finish a job that should be done in a few weeks.
After that you have more than one problem: painting the kitchen, dealing with the mess, spending extra money and the list could extend for several pages.