I think you should decide if you want use the rack more for live performance or for sound design at home. In my opinion these compact synth voices (BIA, LIP, MIA) are good in a live show but when I make sounds in the studio, I usually prefer to patch up my basic Doepfer modules, because I can get more unique "modular sounding" stuff with more control over the sound. If I could go back in time, I'd only get the Bitbox, a few basic modules (vco, vca, lfo, env, etc), cool modulation sources and a matrix mixer. In you case, as others said, integrating VCV rack with Expert Sleepers, would be a huge plus.
Also, I own both the LIP and the Cs-L and the Cs-L is just way more fun for me and covers a wider acoustic palette. YouTube vids don't do justice imho. Complex analog oscillators can get gritty as hell with some distortion, more than the LIP. But they are also more unpredictible, so again, in a live show it may not be what you want.