you'll need a better power supply than the uZeus - max -ve rail is 500mA - and you're over it, let alone leaving any headroom...
I'd go for a bigger case - something like a mantis - and have some space left over for the inevitable expansion* - it'll also mean you have plenty of headroom on both rails! - they come in black these days I believe and have way better power supplies than the uZeus!!!
or if you're set on a single row and it's DIY then the befaco excalibus is a decent power supply and doesn't take up valuable space (no rack wart!) - can't say I'd be happy with the layout like that - external input in the middle of a row etc
I don't have a lubadh, or any other instruo modules for that matter, but I'm sure there are plenty of others with multiples of modules that are in the same price range... and lots of people with multiples of other musical instruments that cost way more (guitarists - multiple guitars and amps, both often more expensive than any module, for example) - so I really don't think it's unrealistic to have multiple lubadhs - or really any more excessive than any modular synth... after all it's only money... and yours is yours to do with as you please
- filters, effects, a proper mixer etc!!!!
"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia
Utility modules are the dull polish that makes the shiny modules actually shine!!!
sound sources < sound modifiers < modulation sources < utilities