What is the easiest way to create a tycoon style game?

Hi there,

I have an idea for a tycoon based game similar to theme hospital.

I have looked on the marketplace for a good top down camera which can rotate and a top down building system… I am unable to find a building system to place static meshes into the world but I am able to find an rts camera which looks like it would work.

Any advice on making an easy building system where I can place static mesh into the world on a grid system perhaps?

Thanks