The RAST bedside table is something that comes up again and again on the forums as a cheap rack-mount solution, and understandably so-- the area above its shelf is exactly 6U tall and 19" wide, with another 2U or so available underneath it. It costs $15.
A, say, SKB 6U rack costs $125. Obviously, the portability and durability of an SKB/Gator/etc. case is what you're paying for, and is way above the specs of something like this, but if you just need rack space for your project studio, and want something that looks nice, order a RAST. Being an IKEA thing, construction takes five minutes.
Once the table is built, just install 6U strips on either side to mount your outboard. That's it. Total time and cost for building 6U of rackspace: $25/10 minutes.
I'm thinking about adding handles to the sides and building a pair of face plates. I don't plan on taking our synthesizer out of the apartment, but it would be nice to have the option at some point!