I recommend that you keep your collection on a pc. I have one system that I use build my entire collection before transferring it to my laptop. I also use it to build my USB that I use with CDJ's.
You can build a USB disk to house your entire collection and database. Then you can connect it to multiple computers. You have to configure each system to use the same drive letter each time you connect the disk. Then configure RB to store the database on the USB disk so your tracks have cues, playlists, etc.
Make sure you have good backups. I keep my backups on Google Cloud for security.