Cheers mate.
As for budget…it was more of a bodge it. Most of the bits I had just lay around from previous project’s. The tent itself is a marketing piece by matrix to display In a hydro shop. Ended up with it for like £2 but I’ve not seen any this small for sale commercially.
That thread shows you how to make the light 
You don’t need Arctic Alpine fans any am3 heatsink/fan combo will do it.
The aero bucket is a bicarbonate of soda bucket with 4 holes drilled in it for 2" net pots. A 14w pump which are like <£9.
I paid about £3 for 100 of the little plastic misting heads.
A sonoff th16 is around £10
A sonoff basic around £5
The 2 other fans circulation/extraction are 12v PC fans. Running on a little 12v driver…both fans to one driver.
Max draw is 85w usual draw 70w
The app I’m using is called growtracker. Worth a look definitely 
We’ve actually got pistils on 1,2 and 3. 4 is still in limbo