Wabsta said:
DON'T! TAKE MY ADVICE! DON'T!
Let her pay the extra money.
Because that extra money she pays, means, that you are not responsible for anything in the computer breaking. If something goes wrong, and you built it, it's ALWAYS your fault.
So let her buy an expensive one, where she can blame the company she bought it.
Take the advice, and you got this from an adult.
Sometimes adults need to be taught a lesson.
AAAAAFTER she has her pointless purchase, and when she's stuck with it, THEN make her a system on paper that she COOOOULD have had, for less, and likely with newer superior parts for a great deal less.
If you can manage it, have the entire conversation put on video, and explain to her that the next time she lectures you on buying something she thinks is a bad idea, you show her the video.
Adults are NOT always smarter or wiser in all things, and occasionally we need to have this explained to us.
Like for instance, only idiots actually take their computer into big bix retail locations for repairs and service. PC experts my hairy butt crack.
80 bucks an hour will likely buy you enough beer to make your kids entire computer class happy. And those geeks actually know what they are doing more often than not.
Plus, they are not working for people shoving parts out the door by lying to you.