Art Install often stuffs a lot of gear up front, in low racks/cabinets. https://artinstall.ru/
You might build something, based on what you can find a deal on. If you can find a cheap MA credenza, like I stumbled across last week, then something like that, could take
you in a different direction. Here's the bare frame of one of those, and I always thought one could section a tall four post computer rack and create rack, and make a three bay
DIY version. (I don't know where you are located, but there's a 2 bay credenza on eBay lingering around right now for $200 in Florida.)
My future plans for my credenza is to build it out to a full width credenza, for a media room. I am thinking wall to wall top, with fabric framed end panels (to hide dual subs) and open
up a door or two, and use some perforated metal panel to expose some gear. A bit of a DIY project for sure, but it would be a very inexpensive statement piece of built in furniture that
wouldn't show off much of it's av orientation. I expect to cover the doors and top, in some nice exotic veneer, or simply make new doors, if I section the rack to reduce it's height.
Building such a frame out of a cheap used server rack, would allow you to easily custom size it to exactly what height you want, and you could hide the cleanout and hide or expose gear as you need
or want to. Considering all the other work that has gone into that basement thus far, this might not be much of a reach..... If that is something you might consider, I could outline the steps to do so, and
even provide you with detailed pictures of my Credenza.