Why not start the same as almost all miners; start small scale and work your way up?
Talking strictly about GPU mining, there are so many mining rig threads all over the place, check them out, research and come up with a plan/details.
Ask yourself these questions:
- AMD or Nvidia? And once you can pick and answer why, you have your base;
- How powerful cards do you want? Density: lot's of low power cards or more like fewer but more powerful cards?
- What motherboard to use? 6xPCIe or one of those 13xPCIe motherboards? What brand? What can you get your hands on? (look around here:
http://cryptomining-blog.com/?s=motherboard it's a great site with many mining-related topics)
- What power supplies to use? One huge or multiple smallers or even high capacity server PSUs? You have to know power consumptions of cards, the PC, the wires you use, your breaker, etc to be confident.
- What frame to put the cards on? Closed case with vents or open frames?
- What CPU/how much memory, what kind of powered USB risers?
- What OS? Windows or linux based? That makes a difference in terms of what kind of miners you can use.
- What mining softwares to use?
- What coins to mine?
- ...
If you'll have a couple of rigs that you can work with you can scale them up confidently instead of buying everything at the start and running into costly issues.
Whatever the case might be, I'd advise not to invest all your money into mining; have a nice cushion in case something awful happens. Also, definitely talk to an electrician before you go crazy.
