In 40 years' experience, sometimes with temporary darkrooms, you need to smack an enlarger about a bit in order to destroy parallelism. This is, in my estimation, a minor consideration, despite my customary high regard for Claire's advice. Of course if Ms. Anthrope emerged from the darkroom she might disagree with Claire...
R. (www.rogerandfrances.com -- take a look at the free 'our darkrooms' module in The Photo School)
Perhaps single tray processing will help keep your
dream alive. I've been using the single tray method
for a few years. A tray and more than the usual
dilutions of chemistry used one-shot makes for
a lot more roomy darkroom.
A second tray is needed for holding and alternate
trays wash method. Dan
I moved two Durst enlargers in and out of cupboards for many years, they were a C35 (35mm only) and a M601 (up to 6x6 with appropiate condensors), however I have a LPL (Saunders in your part of the world I think) C7700 as my smaller formats enlarger these days and it actually breaks down into 3 bits very easily (baseboard, column and Head). Takes minutes to pull apart or put together and I've only done it a couple of times (now have a permanent setup) Might be an option if you don't have a cupboard big enough to put a erected enlarger.