Well “affordable” means a lot of things to a lot of people. I personally integrated a 6U rack in my Jaspers keyboard rack and it was pretty cheap. Audiorax makes a nice turret-style angled desktop rack which puts controls at a good angle, but honestly I’m not one for putting patchbays on my desktop - the snakes of cables coming from the front are a bit annoying. If space is really a premium, you could just take a few small blocks of wood and screw a single 1U patchbay to the underside of your desk (I did that for quite a long time, it worked perfectly). That way at least the cables have somewhere to hang instead of taking up valuable desk space, and it’s a little more straightforward to patch in stompboxes or other outboard.
But if you’re going to really invest in some rack modules, give ergonomics a thought and figure out what you plan to do. It might make sense getting a turret or a monitor bridge rack for a little more now, in order to have a clean, organized, and ergonomic workspace, and you might still relocate the patchbay itself somewhere a little more convenient for the use case you intend.
Just some thoughts - there’s no right answer and it really comes down to your own needs and budget. A quick google for “desktop angled rack” will turn up solutions ranging from the ugly-but-straightforward open frames to some surprisingly affordable (for studio furniture) bridge and sidecar solutions. And as @bradfromraleigh said, sometimes making your own is really the ticket.
