Redundant Routes

I am trying to create a redundant path between two offices that are set up on a 192.168.1.0 subnet and a 192.168.11.0 subnet there are two existing wlan’s in between the offices on independent subnets, I would also like to create a vpn via a wan as a third route. I have a routerboard RB750. Is this a possibility? Any help or suggestions would be appreciated.
Mikrotik Redundant Route.jpg

I guess I should have said I have a pair of RB750’s

yes , you can add three gateway in your default route .