You can find alot of the components on amazon but, youll be lucky to find any GPUs at a reasonable price.
Mining in the cloud is easier although its dependent on a steady price increase. I can tell you more about that if youre interested.
My fav projects to date (only listed if i understand the project not the hype)
ETH
BTC
LTC
XRP
SIA
To Donate :)
BTC Wallet - 1KmQv2oDbnGMwZG1Wcxy9P216Te8jLm6QW
ETH Wallet - 0xDd464328A8dB6424C3C09E21c767c086245F0145