Can you still get dome PTZ cameras wired?

You can still get PTZ cameras Wired which do not cost an arm and a leg. Depending on the model of the NVR you have comparability would need to be checked.

Of course PTS is effective only when being actively controlled . A better solution for ongoing capture is the right number of cameras correctly positioned

yes

Yes you will need to make sure the new cameras are compatible with your existing recorder

You can get great PTZ poe cameras that don't require a recorder this has its limits though , as a self installer you will be limited to the warranty you receive through the company you purchased this from , for lower end cost could vary from £50.00 to £200.00 were as getting this through a professional trader or installer you would receive the life time warranty of 3 years and for this sort of device with a fair few mechanical parts it is well worth the extra amount . I would recommend using YouTube as a starting point to see what you would really receive for your budget. Take a look at this Video : https://youtu.be/5MoynorQ3y0 This should clear some much needed answers up :)

If you want better quality cameras I would recommend upgrading to a better cctv system swann is a very basic diy cctv system

PTZ cameras are still available however PTZ cameras are only really effective when being actively controlled, personally we recommend upgrading to a better cctv camera system swann is a very basic diy cctv system you would be better with professional installed system like hikvision