I have both an NX5U and an X70. Both are excellent cameras. The 5U is heavier and, in my judgement, not as easy to use for “run and gun” work. We’ve been shooting four to six hour days on a construction site with the X70 and it’s really a joy to tote around.
Both cameras produce an excellent image and, as Mike points out, the X70 can be upgraded if and when your friend decides to try her foot upon the 4K ice.
Like Mike, I wouldn’t buy a refurbished camera unless it was through a very reputable dealer like B&H and unless it had a warranty of several months.
