You will require a minimum 3000 watt vac . Carbon fibre poles . An a 6kva generator for power
As Carl mentioned , industrial gutters are wider and deeper to clear out .
We have cleared out supermarket gutters and find plastic bottles , mobile phones , needles , plastic bags, cans the list goes on
If its a big job , get access equipment and a miniskip on site if the gutters have not been maintained for a few years
Ed