Need good quality but don't want to pay more than necessary.
Well, if you really don't want to pay any more than necessary, I suggest you start by looking at this. It might not do everything you want, but it's excellent value, and it will allow you to consider how much various 'nice to have' features are really worth to you.
https://www.amazon.co.uk/gp/aw/d/B017DCMB22
I've got one of these. It doesn't come with a hard disk (some of their models do, but this one doesn't) so I bought a 1TB hard disk for £50. Total cost £270 including VAT for a complete 4-camera system.
It was unbelievably easy to set up. Install the hard disk, plug the cameras into the recorder box, attach a monitor, switch on, accept all the default software configuration settings, and it was working. Really effortless.
There are a few drawbacks though.
One downside is that it doesn't integrate easily, if at all, with other home security devices. I think it *ought* to be possible to interface it with my home server, so I shouldn't really need the 1TB hard disk, but I'm not an expert and I didn't want to spend a load of time trying to work it out.
Another drawback is that the remote access software seems a bit flaky. The phone app is fine, but it seems to be live view only, no access to recordings. The browser access is IE only (not even Microsoft's new Edge browser, because it needs to use ActiveX components), and it seems like it should provide access to recordings as well as live view, but I haven't yet managed to get the recordings bit to work.
Still, an awful lot of capability for the money, and it made me question how much any potential additional capabilities were worth to me. Answer: not enough.