By rig I'm assuming you mean GPUs. One of the biggest factors to look at with the rig is that even if the market goes to shit and you have to get out you still have tangible assets (your rig's parts) that can be sold for emergency funding or still be useful for other computing applications etc. This is the biggest determining factor for building a rig for me, that plus newegg gives me credit at cheap rates.
@rodthrower18
Yeaa GPUs ... probably I would go for 6 x Radeon RX 580GB 8GB
Thanks for the comment
The RX580s are good but super rare right now. Alot of people myself included are building lower wnd rigs just bc that's the only gear that's not grossly overpriced right now. If you mine the right algo and hodl a good amount you'll still come out on top.