thank you for your reply guys.

Yes it is pretty clear that 6K is not going to go anywhere for Hardware. I need to increase this to the budget to support 6 x 270HT (s21 xp) I guess i am looking at 24-30k GBP

Do any of you know if there is a significant current draw if you swap out the air cooling for water or immersion?

Also my other question i wanted to ask is , the power cable can support a maximum of 100amps/240v continuous.

If i needed to disable 1 or 2 mining rigs for a few hours each day, can i literally cut the power to them and then turn them back on when required. Will they just boot up / connect and continue on their hashing

or will i have to reconfigure their settings ?