The structural problems aren’t something a pool coating will fix. This requires geotechnical engineering that is beyond the capabilities of a pool company applying a coating. At best, it’s a very short-term aesthetic upgrade.
Try this for some more info about this....
34 mil spent in 2010 to fix it.
2000 ft. Long and nearly 200 ft. Wide
How Deep is it?
.
Sounds like a Pool to me.