Home made tyre filled with concreted in galvanised pole. Works well as a swingball base too.
The rotary line can be lifted out easily leaving just the galvanised pole/ tube, maybe 3' long.
It is very, very heavy. I.e., It has never blown over even when full of laundry.
I would guess it will take four people to dead lift it, so unless you have a sack truck and a van it's not going anywhere.
Rotary washing line with heavy base (Street)