Need a little help: RB750gl related question

Hi all, I have two Ethernet drop from two different network. and my current set up like this:

both are TP-Link wr740n v4.23 router with OpenWRT 12.09 and wi-fi is switched off. I only use them for routing purpose. I have other gears for wireless set up.

my home network is 172.18.3.0/27

  1. router A WAN port have a single IP of network A which have internet and it is masquerade. gateway provided by my ISP

  2. router A LAN port have 172.18.3.1/27

  3. router A have a static route at LAN side for network 172.18.0.0/16, gateway is the router B LAN IP

  4. router B WAN port have a single IP of network B which don’t have internet access and not masquerade. there is no gateway

  5. router B LAN port have 172.18.3.30/27

  6. router B have a static route at WAN side for network 172.18.0.0/16, gateway is the next router of network B

I am willing to buy an rb750gl, now my question is can i replicate my set up with a single rb750gl??

Yes.