Well...what does it say about Photoshop?
I will admit, I don't think there are more than a few hundred brushes in Elements, pre-installed, at least. But I have added several dozen free sets and I know there are many, many more non-free sets. Elements uses exactly the same files for brushes as Photoshop does. And, of course, you can create your own...just like in Photoshop.
They are the same xyz.abr files you'll see in PS.
Elements also uses abc.atn files that are also found in PS. Without sounding more like a broken record or an Adobe shill (which I am
definitely not!!!), I still don't understand what you can't do in Elements that you did in PS. I'm not saying there is the same menu item; it may take several steps in Elements than a single action in PS. And you may see only a simplified Dialog in Elements than one that combined several functions into one in PS. I have never owned PS, nor have I ever needed it. I don't even use Elements to its fullest capabilities!
Frankly, it sounds like you would be more likely to be using Illustrator (assuming it is still around) to create vector art rather than PS/Elements which are pixel oriented painting apps.
I think you might as well sell Elements for whatever you can get for it and buy whatever it takes to get the "real" Photoshop app and quit worrying about what you might not be able to do. Life's too short to worry so much about something that may never occur! You've obviously used PS and know what it can do and I'm sure the latest versions can do even more. Buy it and don't look back!