Modular Overkill has a cost breakdown of using IKEA Rast Nightstand as a DIY 6U Eurorack modular synthesizer case:
The IKEA Rast has been the DIY hotness for several years now due to its combination of low cost ($15), perfect size (equivalent of 6U+2U x 19″ rack), and construction (solid wood vs. laminate).
Total bill of materials:
IKEA Rast Nightstand: $14.95
Erthenvar Vector Rails, cut to size, 2 pairs x 94HP (i.e. order 188HP): $38
Erthenvar 84HP threaded strips x 2 pairs: $20 (optional, you can use sliding nuts instead)
Erthenvar M2.5 hex screws x 100: $6 (M2.5 are less common than the M3s)Erthenvar M2.5 square nuts x 100: $6
Erthenvar 3U bracket kits x 2: $40
Power: your choice
This is a fairly common mod, because of the ease of the relative availability of IKEA products. You can find another build example at Cane Creek.
If you’ve got your own examples, share a link in the comments!