regarding 12 -- some mold remediation procedures are relatively DIY friendly once you have a bit of knowledge on the subject
regarding 13 - now I'm confused. we're telling people how to clean mold when in #12 we're telling people not to clean mold. the whole piece here implying it can just be wiped away should be removed. simplifying mold cleanup like this is what leads to bad DIY jobs.
#2 and #3 are a bit at odds with each other. I certainly get tired of coming back to the same problematic code that's difficult to read and maintain. I appreciate others (and myself) for writing clean code.
I DIY as much as I can within reason. I couldn't begin to count the amount of money I've saved over the years. Plus, when it's something you've worked on, it's even easier to work on in the future because you understand it inside and out.
I don't work things I don't have the knowledge to do safely (some electrical work for example), or things I feel I don't have the knowledge to do correctly and there's risk of really bad resulting issues (I don't touch load-bearing walls for example).