Certainly don't just buy a "adapter" and use a standard surge protector with it, because the plug fits. Standard surge protectors are rated at 15A, in the USA at least. ... You're talking multiple rigs anyway, right? So you're going to want a PDU. Spend the money on it, before you blow everything up.
And as we've seen in this very thread ... Electricians don't know everything.
I'm planning to buy this adapter :
https://www.amazon.ca/Conntek-P1450650-Generator-250-Volt-Adapter/dp/B00SSQIYLUand a 40 amp PDU to distribute the power and not blow anything up lol
I'll be using around 3500+Watts. I'll talk with an electrician just in case... thanks for your help.