24V DC power supply for controlling single-colour LED strips - max. current 20A, output 480W

I would like to implement the control of single-colour LED strips.
Based on the diagram for the RGB LED module, I understand that an external 24V DC power supply is required.

The power supply must still be connected on the 230V side and the control is done on the low side.

The maximum current for the 4 channels is 20 A.

So the total power of the 24V*20A tapes = 480W - after deducting the power reserve I understand that I could plug in a total of about 30m of tape (15W/1m)

Is my reasoning correct ?

What kind of strip-mounted power supply (from practice) can you recommend - I have read that it happened to interfere with the operation of the temp sensors?

What LED strips do you recommend ? - What do you think about COB strips ?

Consider that the controller itself will also wipe out overnight. The diodes will heat up, so check how much power they will draw at higher temperatures (there can be a significant difference). Only after you have taken everything into account should you choose the power supply - a few percent reserve compared to the power of the strip is not much.
In addition, you need a proper power supply for the leds - if you power 30m of tape from one side, there can be a significant difference in brightness.