Quick critique: IDK that you would need both the Pam’s and the Varigate for that size rack but it’s cool - you are getting ready for expansion. You are lacking more standard modulation like LFOs, envelopes, S&H, etc. (you can use deeper functionality on the Pam’s or even the varigate to sequence modulation...). I know the more complex modules have built in VCAs but if you stick with modular you will come to understand the power of VCAs - it leads to modulating the modulator: ex. Opening a VCA with an envelope which allows an LFO to modulate it’s target for the cycle/shape of the envelope and the envelope is triggered by a rhythmic element in the patch. That is where modular shines. The BIA in particular does AMAZING things when approached this way. Trust me, I learned a lot the hard way. Either way, you have a fun starting point and you will definitely be able to do cool stuff with what you have.
I know that spending good money on a euro case is hard to swallow when starting out but it will save a lot of heartache/insanity around wanting to grow, fighting against it, selling/buying new cases. I have had modular for 6 maybe 7 years and I started with one of those little Doepfer beauty cases with the idea of doing better bass synth sounds. At times I have had up to 15u of Euro, other modular formats like Serge, Modcan A, Ciat-Lonbarde, Hordijk and have been staying with an 18space of Buchla 200e for quite awhile.
I would suggest to anyone starting out in Euro to go ahead and get a 6u case that is at least 168hp - unless you absolutely know exactly what your needs/desires are, have lots of synth experience and have the personality traits to not look at the shiny new stuff coming out. Don’t try and fill the case initially but get enough stuff to start having fun.