Take the Neutron out. Here's why...
We'll assume that the case is actually a Doepfer A-100 P9, which "streets" at $675. The case has a total of 252 hp available. And the Neutron goes for $329.
675/252 = 2.68 This is the cost per HP of the cab.
80 x 2.68 = 214.40 This is the EXTRA cost to house the Neutron in the Doepfer cab.
As such, this then makes the Neutron cost $543.40 while, at the same time, you've got a synth that should already have a case taking up 80 hp in a case that should be for modules that don't have that case of their own. And you need that space, mainly because there's a lot of small modules here that would be more usable if you went with larger versions. Case in point: the uGrids. Now, yes, the original's discontinued, so the only option there if you have to have one, it'll either be a clone (like here) or a used Mutable one. But given that the original is 16 hp and the clone here is half that, you'll almost certainly run into ergonomics issues which wouldn't be so limiting had you had access to Mutable's original. But then, if you go bigger with the modules, you then run into that Neutron again...which basically prevents expanding into more player-friendly modules by taking up all but the last 4 hp in an entire row.