No simple equation or calculator exists to give you the answer you are looking for.
It sounds like someone (engineer? contractor? manufacturer?) already gave you the solution.
2000 kg is significant weight. It's not something I would attempt to lift without proper assurance that the support...
I understand the difficulty finding an engineer to take on this project in a rural area. However, physics works the same in rural or non-rural areas.
I would hire a POOL contractor with experience building above ground pools and indoor pools. They will subcontract the necessary engineering and...