Bearing this in mind I'd imagine you would get conflicts making calls to an external instance of Mochad as a separate service running as a daemon. I certainly couldn't confirm this but it would make sense.
David Wallis over at the Homegenie Club states that he has internalised the Homegenie/Alexa bridge within Homegenie. You may want to PM him or post on the forum to confirm this. It may save you a little time with this project.
Originally this was to be a single use PI project not to have another automation software installed along side it on the same PI.
The Pi was original designed and created for just that, a single project development board. I full well expected conflicts with a software not using Mochad.
I like to push my PI 3b+ as it is a bit more powerful then the other older ones available. I highly double my zero would run this and a Home automation software that used mochad with out over heating but I'll definably test this over the winter.
Ha-Bridge runs fine with HG, and in reality if you use HG, ha-bridge can make calls to it, you don't need this project or Mochad.
From what I read on David Walls HG Alexa bridge the internalizing was more to auto pull HG devices into the Bridge. Something that can't be done with HA-Bridge for HG, but could be if BWS Systems created a helper for it which he's done for HA, OpenHab, Domoticz, and other softwares.
That being said I continued to play with this and Domoticz but this time on a Raspian stretch full install (with GUI) so I can monitor the CPU usage as I add things to Domoticz.
Originally I wasn't keen on the feel of Domoticz but it is growing on me! I may just keep it on a SD card with this project to do a good comparison against HG. But that's another thread.