After seeing the side view of the case and that sawtooth mating joint, I can see why the 4th axis would be useful. Again, somebody is going to need to see those details before they can give you a solid quote. Maybe you should offer NDA to interested parties, then award from there?
As for pricing, $50/hour for CNC time of essentially prototype products is a fire-sale. If he's completing two cases an hour (both halves), he's already gone to the trouble of making specialized tooling to hold the parts (no way to make those parts that quickly in conventional vises).
Yeah, a 4-axis machine can do them faster but, I doubt you're going to get a 4-axis machine, the tooling necessary and somebody who knows how to program and run it all for less than $120/hour.
As for anodizing, I'm in aerospace and I can't think of a single machine shop that does any kind of in-house anodizing. On top of that, if this is for a product line, you should take control of your anodizing and get one reputable shop for ALL of your products.
Getting a color match from batch-to-batch is hard enough without inconsistency between anodizing houses. That is true even if you do find somebody on here to do the machining for you (unless they're going to do ALL of your machining and therefore outsource ALL of your anodizing).
Just my $0.02.