It's a beautiful composition.
But, in my opinion, not ready for the investment, not yet.
You need to work on the star trailing evident in the download-close up. The stars are still egg shaped. And no amount of post-processing will change that. It must be addressed in your actual acquirement of the images.
How are you guiding/tracking?
That is where I can see room for improvement.
Something truly great is this is from your backyard, so you have night after night to work on it.
In Astrophotography, it is said the mount is the most important part of the equipment. Because the mount carries the entire quality of the result.
Shorter exposures, but greater numbers, can give you better images to work with to build your finished image with.
One of my friends told me, "Sonny, you stack with time." Back when I was starting out. Because I had to take ridiculously long exposures to get any form of an image. It was my camera that was at fault.
Over the past years at this, I've been following a new vain of thousands of exposures at varying lengths.
I think many short exposures stacked can have equally as good a result as fewer longer exposures.
So experiment with your exposure times to get smaller, pinpoint stars in your images for your stacking and processing.
You have a great start, now it's time to dial in your raw material to work with.
Keep at it.