As far as commuter service from the West Shore to Victoria, why not use regular buses outfitted with retractable rail wheels, such as the ones used by railway maintenance vehicles?
The buses would be able to pull off the rails and do whatever routes are required, then return to the rails at will. This could eliminate the need for large stations etc. This way the rails are in place for future trains. Of course, this would require co-ordination on direction etc.