You can sync BusyCal between your Mac at work and home through iCloud. Once you connect to iCloud, any events you create or edit on your Mac at work will be synced to your Mac at home through iCloud and vice versa.
All calendars you wish to sync between work and home must be hosted on iCloud. Unique data types in BusyCal (Stickys, Journals, Graphics, Attachments, Tags, Recurring To Dos, etc.) will sync between home and work through iCloud with some limitations. See iCloud limitations for more info.