Before i start buying parts, wanted to see if anyone has done this and how they've gotten on?

Purely a budget/hobby/1st rig project. Im fully aware im not gonna be pulling in £20/day with it.

Aiming for:

Z270 mobo - 3 cards in x16 and 3 on risers (trio rig style)
Celeron cpu
4gb
nvOC running from USB stick
1 750w or 850w PSU could be fine for 6 75w 1050Ti cards?

I will be aiming to mine 100% Equihash coins.