Where can I get an XL base for my 4 side rotary washing line, normal parasol bases aren't stable enough?

Question

Where can I get an XL base for my 4 side rotary washing line, normal parasol bases aren't stable enough?

Answer 1

For that much weight that high in the air that naturally catches the wind you need to pour a small contrete slab with a hole in the center or buy a couple of concrete garden slabs and cut a hole through them for the washing line post