You are concerned about the Chinese Government but then you buy from a hacker directly, giving him access to your network
Next thing to consider: If you are on holidays and there is an issue: Who do you want to come in to fix it?
I presume Hikvision cameras are security compromised. But they are also about half the cost of name brand cameras I prefer. So when I use Hikvision, which I do, I always use a Hikvision-only password, I always enter Hikvision-only security questions and answers, and I only put them looking at areas or things which I don't care if a hacker can also see. In summary, to get the price benefit I raise the guard a lot on my side of the security issue.
At my SS, except for some local on-site help, I do everything possible without relying on others. So although I might install a NVR or device made by others, it is me that will config it, install cameras, and fine tune it. If it happens to crap out on a holiday, I will just have to "get there when I can" to correct it. Obviously a LRP is not mission critical, like a pump or air compressor.
I appreciate you sharing your experiences from having such a system up and running. It really helps when I am on the entry side of a DIY project. I had also looked at Geovision but after reading your post I don't think I will keep looking at that.
The openalpr capability is getting more interesting. It does push the plates to cloud storage, which I don't like. But have a "free" service with 2 days of storage of plates is pretty appealing, considering the alternatives.