A Jobo CPE is a bit of overkill for B&W, and needs the foot print of about 2 11x14 trays. For tubes and space savings a roller base and tubes from unicolor, Jobo or Cibachrome would be a better choice, absent other considerations.
My 11x14 (12x16 actually) Nova takes about 1800 ml of chemistry per slot. If you use a developer with good longevity then it can last for weeks. The slots have tubes and valves for draining, and if you're working in a temporary space you could drain it after each session, you probably don't want to move it around full. The drained developer would last even longer in a full, tightly closed bottle.
Doing B&W in tubes slows down your workflow considerably. First off, since you can't monitor the print progress you don't know until processing is completed that your exposure is way off. Then there is all the cleaning and drying between runs, even for test strips. Multiple tubes help, but don't eliminate the problem. Finally, a print isn't always processed to "completion", but if you're using a tube you're stuck with processing strictly by time, or doing muliple tests just to find the best processing time. Experience and perhaps working with a meter will help, but not eliminate those issues.
My darkroom is tiny, and I initally tried tube processing in my Jobo, but abandoned the idea pretty quickly, then I found a Nova at a good price and never looked back. YMMV though. If I were doing a temporary space shared with the laundry, I'd build a plywood "counter" to go on top of the machines and put the trays on it side by side. I'd probably build it with a short lip maybe 1 inch high to contain any spills. Then, when the printing session is over, empty the trays, wipe down the plywood and set it on it's end/side wherever it could go.