I understand that System Essentials can't managed non-domain machines. Not happy about it but "it is what it is". That's a real bummer b/c several of our SMB's want us to manage their home computers and laptops that aren't part of their SBS domain. As an alternative from Operations Manager with a gateway I believe we are able to managed non-domain machines by following the guides for this using certificates. Does adding Remote Operations Manager limit/prohibit this or will we still be able to managed non-domain machines with our Operations Manager server/gateway setup?
Also, ROM is built for SMB engagements which is why we connect it to SC Essentials. SMB is the vast majority of our engagement but we have a few potential customers that have more servers than Essentials allows. I think that means we'll need to install Operations Manager on their LAN and have it connected to our master Operations Manager. Does the fact that we've added Remote Operations Manager limit that or can we have one master Ops Manager to manage our SMB clients (running SCE), our larger clients (running Ops Mgr), and our very small and remote clients (with agents talking direct to our Ops Mgr via gateway)?
I hope that makes sense. We're trying to have "one Ops Manager to rule them all". 
Thanks,
John