30 bot is much you will need a pretty awesome pc to run that much bot at the same time.. So it will cost you lot..
Motherboard: Asus sabertooth 990FX
Graphics card: Sapphire toxic r9 280x 3gb the only reason to use this is the 3 GB 384bit interface, 6400 MHz memory clock and the main reason is 3 fans
Processor: The minimum should the AMD FX8320 am3+
RAM: You will needmuch so at least 16 but I'd prefer 32. From rams the best choice are Corsair Vengeance from this the DDR3 2000 MHz
Winchester: I don't think that you will need much free space so I'd say TOSHIBA 1TB 32mb SATA3
Cooling: You must use the best water cooling system because the processor generates fucking big temperature (60-65 °C) sooo Cooler Master seidon 240M
Power supply: You will need many watts couse the processor and graphics cars I would say Corsair TX850M (I'm using this too) I'd say 10000$ EDIT: Case: Cooler Master Chosmos II ultra