Choosing a NAS for Surveillance?

Question

Iron

Greetings!
Introductory - there is a dacha where you need to add video surveillance, with remote viewing of images from cameras, access through an iota, which means there is no white IP address.
IP cameras with POE will be powered through a switch in the amount of 6 pieces (+ - 2 pieces).
1) I want to figure out which company is better to put the storage?
There are three options so far: Synology, ASUSTOR and QNAP. In the first two, from the same android, you can connect to the cameras using their services (you register an ID on their website and connect to us), in QNAP, as I understand it, there is no such thing ... In connection with this, the next question!
2) Will DDNS replace these services?
3) What processor and how much RAM is enough in cases (they are not connected with each other, different people asked to look for information):
3.1) Apart from the cameras, nothing is planned.
3.2) Another option is planned for a person who is starting to study the science of creating sites =) Accordingly, in addition to this, it would be good to deploy sites, a database for experiments and can also be used as a media server.
Thank you for your attention!

Answer 1

we did everything on HiQ (recorder with hdd + poe camera) - about 7k for the registrar and 7k for the camera + a screw to taste
built-in services such as DDNS a bunch and a trolley
there seems to be a mobile client, it seems you can connect by id through the site

Answer 2

Iota sells white static addresses. I bought it myself and use it in the Moscow office.

Answer 3

Synology - out of the box everything you need is already there. Everything is configured without documentation and dancing. The main thing is that the speed of the disks is enough.

Answer 4

1. Take Synology for sure
   
2. Not
   
3. Take everything above ds112+, ds713+ is better. the only BUT - there is a license for 2 cameras for free, and if you still need cameras - for money. in general, synology has a calculator on its website for video surveillance solutions