Just make sure you get a grounding strap and make sure you are grounded as you work on the unit, so you don't blow it up from static.
I don't think you will have trouble putting it together.
I put this HTPC together four years ago with Bored's help. I use it all the time and love it.
I used the best quality parts I could find and it has now many hours of use on it.
The tower audio workstation to the left of it I built in 2002 from the best parts I could obtain. It was costly for a PC at the time, but it now has had lots of use over 15 years. If I had used cheap parts I likely would have got through several by now. It still does everything I want. It will be due for replacement, but I will have to update WaveLab and buy a new RME unit, so it will be a costly project.
I firmly believe you are lots of dollars ahead taking the high road.