Simplest solution (as I can see it) is to be restricted with print size. That way base of enlarger not need to be large, and enlargers head not need to be raised a lot, so you would have space. If enlargers base is too small for enlarger to be stable, you can try wall mounting. This is what comes to my mind first. Second thing is, as far as I can remember Meopta's Opemus 5 head is not going too heigh. Also, column of Opemus 5 is not going straight up, it is angled toward front, and that too helps. Just keep in mind Opemus 5 is up to 6x6 cm enlarger.
I use Magnifax 4 (6x7) and altough I don't know it max heigh (with head raised up), I think it is too tall for your space. Opemus 5 is significally smaller.
About Kienzle enlargers and your space: 6x7cm enlarger (model C67) has max height ca. 1280 (1440) mm, your min heigh is ca. 950mm, baseboard is 550x725x40 mm (other sizes can be ordered) and your baseboard place is ca. 820mm, so if not biggest print size is needed, it maybe can be solution for you.