Eurorack can be expensive but so are standalone synths, drum machines etc.
Synth voice like Mother 32 / modified 0-coast can be a good, not too expensive start for example.
The problem comes with the empty space which just looks “unesthetic”.
Cheap Doepfer case can look really good when you put more work into it.
Oiling/staining, attaching custom handle and in the end filling it with modules creates really unique piece.