I shoot with a d7200 and have the Nikon 20-35 2.8 D lens and the Nikon 70-200 4G AF-S.
I'm think I'd like to fill in what I feel is a gap for special wider lens occasions. Up to last night I thought the P lens were not capable with the d7200. What is it with the P lens? Why do they seem to be lower priced than glass. How's the sharpness on the 10-20??
I don't have the lens but have looked into it and this site https://photographylife.com/reviews/nikon-10-20mm-dx-vr-af-p has a very thorough review of the lens and comparisons with other lenses. It is a decent performer especially for the price. It's my understanding that AF-P is the type of motor in the lens. Nikon chooses not to update its camera firmware for full backwards compatibility, maybe to force you to upgrade or they just don't spend resources to do this.
It's my understanding that if you update your d7200 to its latest firmware the only incompatibility is that VR which is controlled with a menu will always be on. This may be an issue for you. I think Nikon recommends it be on even with a tripod unless you're using a really high shutter and I always keep it on my 18-55 AFP and haven't noticed an issue.
There just aren't many really good / affordable wide angle lens choices for dx (a prime would be nice) which my also be by design to push people interested in landscape to fx. The tokina 11-16 dx II and 11-20 lenses are supposed to have superior optics. They are f2.8 constant aperture lenses. I've read that they have AF issues - and may only AF correctly if using the center focus point.
The 10-20 AFP is currently on modest holiday sale; and its cheap to begin with.
Tamron 10-24 f/3.5-4.5 Di-II VC HLD (b023n) is worth a look. About $500 new, used for $400 or less. I've got one that I use on the D500 and it is kind of shockingly good. Build is great, VC is excellent. Only real gripe is the relatively slow (and variable) max aperture, but that is forgivable for an UWA.