Hi @TriLife, welcome to the forum. It think it is a wise decision to consider using a local gateway, rather than a cloud solution, for your home automation. Question: What is the role of the Universal Device Gateway in your solution? A quick look on their web page makes me believe the gateway would allow you to connect your sonoffs locally.
The purpose of the Polisy is to allow nodes to communicate with all of my Z-wave sensors and ELK alarm system (via the ISY994). My Sonoff switches are the biggest load
The NodeStore on the Polisy has an MQTT node server available, but I'm too inexperienced to get it to work. Not much on the internet...