How do you go about building a miner? I haven't seen an asic hobby kit around.
I see that asics don't seem to be around to build...but what about the GPU route?
or what about 5 of these?
https://bitmaintech.com/productDetail.htm?pid=00020141029135048724z39CYwEQ0684
You don't "build" a C1. You hook it up to a liquid cooling loop. In fact you can't actually "build" an ASIC miner unless you have many millions of dollars. There are some miners for sale that need some minimal assembly but you don't really save any money by putting them together.
And GPU mining of BTC has not been profitable for well over a year. You might be able to find a few alt/scam coins you can still mine with GPUs but it's dying very quickly... if not completely dead already.