this box can do 150

 ant miner s19 or whatsminer 50 or ant miner L7

will will do 1/2 of it say

55 s19
10 whatsminer m50
10 L7

At that point we will need a second transformer

like this one
https://www.larsonelectronics.com/product/152507/225-kva-isolation-transformer-415y-240-wye-n-primary-208y-120-wye-n-secondary-nema-3r


that will bring us up to the full 150 units of gear.

maybe 110 s19's 20 m50's 20 L7's