I agree that running any kind of software requires trust, downloading applications from the internet and running on your computer always irked me myself and many others no doubt. Best thing is to review the source and compile it yourself, of course. However, it is difficult to expect many people to invest so much of their time in order to become proficient enough to build open source software with numerous dependencies including qt. Exchange with such high requirements for entry won’t receive much business.
Instructions on how to set up the build system are more or less up to date in your documentation, carefully following them is all that’s needed and takes only few hours depending on your existing level of knowledge. I am not really sure if my report of doing it would be helpful to others, since everyone is missing different bits of information in their head while attempting to set up.
What I do offer is to provide regular builds of your organisations software until you have set your own macosx machine in the cloud, that I can help set up to build new releases. I’ve spent some time on the project so far and still willing to do more if community needs it and is willing to compensate the efforts as was stated in original post. Like I said before, I do hope that your organisations are successful, because the success would most likely be passed on to parent projects.