TomatoUSB

Dear all,

I have the following problem. I want to use a vpn connection to a commercial vpn service while on the move and with several devices at once. My commercial vpn service only allows for one connection (and thus device) at ones.
The solution I'm trying is as follows. I'll start a vpn server on my tomato router using the server tab. I can log into that vpn with all my devices while using mobile data or open wifi hotspots. I also establish a vpn connection to my commercial vpn provider with the tomato router. Now I want almost all traffic to be redirected to the commercial vpn provider. Is this at all possible or by the very nature of vpn impossible?
I have looked into ip tables for a solution but I haven't got it working.

Any help would greatly appreciated!

Cheers

Beer