How rare it is to find a marriage where people are in each other's faces 24/7 without strife. I understand the company's financial solution of finding one house, but having no place to go and be with other people 365 days of the year is just cruel and unusual punishment. You all need places and times to be in spaces that have nothing to do with the theater and nothing to do with work companions.
First, frankly the theatre should start looking for another sound person yesterday.
Second, they need to help you find alternative living spaces before you kill each other. Or a neutral space when you need a break. Think about how strenuous and lengthy the process is to find compatible companions for living colonies or space exploration. This, on the other hand, is being treated like a reality show.
Given the situation, and the fact that right now you guys have limited power, you have a few options. You can 1) take the gent aside and quietly tell him the problem, if he is someone who will listen - alternatively have the whole house calmly and nicely sit down w this person and explain that they are causing turmoil for everyone; 2) find another place to live and move there (maybe with the entire company of techs); 3) present this as hypothetical to someone you trust in the office and ask for advice; or 4) quit en masse (or threaten to quit en masse). Of course, you can also inform on him to the gf across the country. Or make sure the girl here knows of his condition to bring that person to your house.
But regardless, tension amongst y'all will only build if there is no outlet or clean space, and if it hasn't already, will seep in the work and the level of snark inside the theater, creating problems in the workspace.