u/These-Bag-6451

Hi all. The Mrs has given me the task of building a front fence for our home. She sent me a pic of what she wants and I'm needing a little advice as to how best to do it. I've seen similar fences where the posts were spaced further apart, which would allow me to concrete each post in individually, but the spacing of the posts in this pic probably wouldn't allow for that.

It kinda looks like they are 90mm posts spaced at maybe 150mm? Should I build a subframe and concrete that in, and then fix each post to that? Or is there a simple way to do it that I am just not realising?

Would appreciate any advice!