Building a deck with yurt platform

[Bonnie32]

We are building a 30x34' deck for my new 24' yurt. The

yurt plans

call for 20 piers to support the platform. We are thinking there might be a way to incorporate deck and

yurt platform

with beam and joist structure using less piers. The sizing of beams and joists is where we would need an engineer or architects input.
Anyone have any ideas? What are the aspects to think about in this. The piers should be relatively short, 12"-40".