Sibyl and I also have some significant projects coming up, so I felt like now was a good time to address these problems.
I took a page from my mold remediation experience, and decided what I needed was basically an easy to set up and remove clean air pressurized containment barrier. I also have to remember that I'm in a rental house, so I can't tear it up too much. I stopped in at home depot and picked up some poly sheeting, a couple of adhesive zippers, some string, eye hooks, an HVAC air filter, and some 1/2" pvc.
I attached the poly sheeting all along the ceiling, put zippers at the edges and corner, and used the pvc and string to set it up so I could roll the sheeting up like a big shade. Then in one of the ends I taped the air filter, and then stuck a bunch of velcro on it, and on a box fan I keep in the garage. That way I can pressurize the clean side of the barrier with filtered air, so that no dust or fumes pass through all the leaks.
Here are a bunch of pictures:
The working side:
The clean side:
Fan and filter:
And with the walls rolled up: