I've actually got a new-to-me 23C II enlarger in my van ready to come to it's new home in my basement darkroom. I've still goto to light proof it but I've been developing film using a dark box (which I love) and hanging it with clips on the 6 gauge bare copper ground line in the ceiling.
I plan on hanging canvas around my enlarger to capture light.
Also, I stole one of my wife's old work out matts and it has been AmAZING on my feet! If it wasn't for that, I'd be all over horse matts!
I didn't spluge for a darkroom sink, instead got a cheap utility sink from Lowes. Got shelves from the Habitat for Humanity ReStore. As for counter top, I've been using a 3/4 in thick wood counter top in my kitchen for years - just treat it regularly with mineral oil, same as i use on my Boss Block (the kitchen is my other favorite room in the house.) I used the same wood in the basement.
The only thing I need to do now is get a print washer and run some lines for drying. Bur for a print dryer, I'm going to use a funnel into a piece of PVC pipe attached to a piece of Plexiglass with holes in it. And I'll probably build a drying box for my negatives.
I'm also installing a computer and my scanner in my dark room, should be fun killing all those lights! Of course, I should just use my old laptop for that...
But I would definatly get something to go under your feet!