Hi, I use Rekordbox on laptop with prodj link and cdj-900 at the club. At home I prepare my sets with rekordbox on my pc and export it to my laptop. Everything works perfectly for more thant two years at 3 gigs a week.
There are differents possible ways to do it, but in any cases the best is to make your laptop a mirror version of your pc. Read this section, details are important: Migrating Your Rekordbox Database
By using a syncing software your database and music location will always be the same for rekordbox. My laptop is a Sony Vaio and I Use FreefileSync to export. With this configuration my pc is always the master. ( To avoid confusion, after a gig with your laptop, you should export your history playlist to your pc via usb stik. In my case I use the export XML functionality within Rekordbox )
Here is a example of the my paths:
I know it seems complicated but you only have to configure it once.
Have a nice day