I think Wolf@8 your suggestion has merit.
The Arecibo dish used natural landform and mesh structure of the dish. Looking at the elements of structure, flimsy at today's thinking need either expensive repair or reconstruction.
There might now be similar landforms if we must look at other geolocations now accessibility is more compared to when it was built. World must be aware of loss to already stressed Puerto Rico economy
Study needed to compare other radio telescopes arrays and frequency spectrum studies that would be impacted without Arecibo
Can Satellites building one in space be cost effective, especially if atmosphere or ionosphere (Van Allen Belt) do not attenuate desired frequencies (wavelengths).
Once the Gap analysis is done, correct choice can be made including rebuilding there with improved infrastructure
Thanks Meghan Bartels for this important news.