Building tiki with cement or foam

Aloha,
I want to build some tikis for my yard using cement and/or foam. To keep the weight down I was going to build the frame out of pressure treated lumber or rebar,cover with wire mesh(chicken wire probably), foam for the features and then cover with layers of cement. While I have an idea of what to do, I ask upon your tiki-knowledge to help me in streamiling my plans. I plan to post pictures when I get this started.
Mahalo

Diesel,
Try checking out the Search for other related topics. There's a few TC'ers who've done some of these.

https://tikicentral.com/viewtopic-new.php?topic=782&forum=1

https://tikicentral.com/viewtopic-new.php?topic=949&forum=1

https://tikicentral.com/viewtopic-new.php?topic=2724&forum=5