Dome with Steel Rings
Adding steel rings will help support the dome -- but it will cost a fortune!

Tension rings made of steel act like hoops on a barrel and prevent the arches in a dome from thrusting outward. Unfortunately, it will take many rings and a lot of steel to hold this very tall dome together.

Your can't afford this option on your budget. You must consider a cheaper alternative.

Stick to steel, but try a different design		Try concrete