A possible replication strategy for this company would be to have each remote worker mirror the main Workgroup, or have the main Workgroup mirror each remote worker's Workgroup. The first case is not desirable since it would require each remote worker to know how to set up a mirror database. The second case is also not desirable since the main workgroup would need to have an External Workgroup defined for each remote worker and updates would be sent out regardless, even if the remote worker was on holiday, for example.
A more suitable replication strategy for this company would be for the remote workers to Work Off-line (See Working Off-line). Once off-line, the remote workers could synchronise with the main Workgroup via e-mail.