I love building my own PCs but I have the advantage of living in the U.S. where almost any part I could want can be had in two days or so with 0 or low cost shipping. Even returns are not usually a big deal. If I had to wait 3 to 6 weeks it wouldn't be so bad but having to wait 5 months is horrible. By that time, what you ordered may be out of date or the price may have gone down substantially on the components you ordered. Factor in the possibility of everything not working and then maybe you are talking a year or more before you have a working build. That's crazy.

The only real hassle for me is troubleshooting if it doesn't work after you put it together. 90% of the time it will just work but when it doesn't, it can be a real hassle figuring out what the problem component is, particularly if you don't have spare memory, video cards, etc. to try swapping out.