When it comes to home improvement/repair projects there is a small debate as to what I will do myself or hire someone for. Usually it comes down to either the time required or the complexity of the project. Just as an example, I’ve had painters come in for every room that we’ve had painted. Not because I can’t do it, but because every surface of this house had wall paper on it and the time required to strip, wash, patch and paint the walls meant that it would likely never get done if I was doing it myself. I know this, because until I had painters come in the master bedroom hadn’t gotten done.
Other things, such as plumbing, depend on the task. I had a plumber come in to splice in shut off valves at the shower, bath tub and another sink. Primarily because, while I know in theory how to braze pipe, I haven’t done it enough (or ever really) to be able to do it adequately. There are some things, such as the furnace and AC, that I’ll likely always have someone come in and inspect/repair just because they’re critical components and it’s much easier to know that they’re working properly.
It’s rather nice, though, to look around and see everything you’ve done to make your home a little more yours.