FWIW, if
@dcy was local, and wanted a working enlarger that could handle medium format and half frame 35mm, I would have quickly made that happen.
There are pockets of people around who have excess stock, who would be happy to either give him one - likely - or sell him one at a favorable price.
There actually may be a bigger barrier -
@dcy 's understandable desire to buy new.
I once bought a new enlarger - in the 1970s. I actually sold that enlarger recently. All the others were bought used.
This really highlights what is a more important issue -
@dcy and others probably are in more need of in-person, on-hand support from real people with some real experience and knowledge. As wonderful and useful as the internet is, it doesn't replace the benefit of on-hand experience.
The other observation I have about temporary darkrooms - and I do appreciate my access to a moderate sized windowless bathroom, even if set-up and take-down is a pain, not to mention the associated disruption to its normal use - is that the more you do this, the quicker it becomes. In addition, experience leads to ease of use - you figure out good work-arounds.
But if you don't enjoy the benefit of seeing other darkrooms, and other people's solutions to the temporary darkroom challenge, it is hard to know where to start.
Which in turn brings us back to the subject of this thread.
In case you haven't looked at it, this STICKY thread about various creative solutions for the temporary darkroom challenge may be useful:
https://www.photrio.com/forum/threads/bathroom-and-other-temporary-makeshift-darkrooms.35581/