Do you have an external USB drive available?
One that is capable of holding the entire contents of the Intel Mini's drive?
NOTE: tell your friend to leave the new Mini "in the box" until you're ready to connect the USB drive.
This is important -- you DO NOT want to create an account on the new Mini until the actual "migration" begins.
Then... do it like this:
Download either CarbonCopyCloner or SuperDuper.
Both are FREE to download and use for 30 days.
SuperDuper might work better for this operation.
Doing things "my way" will cost you nothing.
Use SD to clone the contents of the Intel drive to the USB drive.
Now, set up the NEW Mini.
Connect the USB drive and press the power on button for the first time.
Begin setup.
At the appropriate moment, setup assistant asks if you wish to migrate from another computer or drive.
YES, you want to do this.
So... "point the way" for setup assistant by directing it to the USB drive.
Give setup assistant time to "digest" everything, it will take a little while.
Setup assistant will present you with a list of stuff to migrate.
I suggest you just migrate everything.
Now... let it go.
It will take a while to "move everything over".
When done, your friend should see his login screen, as it was before.
So... log in and look around.
BE AWARE that some older apps (particularly 32 bit apps) won't run.
Other apps will need upgrading.
Good luck.