The tank is the most expensive part, a 47/300 will only get you around 500 shots...
I'd not get the APP bolt, and get an alamo city PB delrin bolt instead, APP is not a reputable part maker for spyder. Leastways, I never knew they even made spyder bolts at all. Also, I dunno much about that Warrior clamping feedneck, I'd stick with the known companies like the NDZ clamping or the CCM leverlock.
As to the hopper, you might want to consider the Spyder Fasta loader when it comes out (supposed to be within a week from now).
Maddman Rocket valve
Trinity Front block
IPS Sunbear Bolt
Dark Horizon titanium striker
Green/silver VSC CCI Phantom
Red/Black PMR SE