> I'd buy an old shed and turn it in to a make-shift data centre, plug an ethernet cable in to a mushroom.

My various jobs in recent years is to run HPC data centres: a little while ago one with 12PB of total storage (along with lots of Ceph storage for ~300 on-prem, private cloud OpenStack instances), a more recent one had about a thousand GPUs (our power usage was high-five digit kWh each month).

Whenever I looked at our routers/firewalls, we never came close to saturating 10Gb/s even with all data sets we dealt with.