BR's point about folder names changing if either Title or Author get touched.
Depending on your situation and both of your locations:
KISS
Have her remote access your machine and fix things there instead of all the gyrations you might need otherwise (still: BACK UP.BACK UP.BACK UP)
Reasonable performance is had on almost any DSL.
VNC has clients that work across all 3 platforms.
If you have a 'Pro' version of Windows: Remote Desktop connection has clients (free) for many platforms (I have one on my Android Tablet
the screen is TINY, but it is there)
PC and Net (LAN) Security are
Trust considerations. (Got a older system? Strip it clean of sensitive stuff, Install Calibre there and sneakernet the Library onto it. )
This solution does not count as a LAN/NAS drive the real work is done on the Host PC, not the remote