Why even use DAZ? AI generated people looks so real, if you are not looking too closely you wouldn't know the difference.
Example:
View attachment 3838321
I just searched for "ai generated people" and picked a random site and got that picture.
If you install stable diffusion or whatever AI software on your PC you can get it to make the scene for you, instead of having to sit at your computer and do the posing, lighting, facial expression and background etc...
You can just type some keywords in the AI software, go make your self a cup of tea and come back to see what scene was produced by AI.
Plus you get the benefit of it looking like real people instead of the DAZ models.
Either case you'll need a graphics card with a lot of RAM and decent processing power.
I would say the minimum amount of RAM should not be lower than 6GB if you want any decent speed for rendering.
RTX 4060 would be good or you can get a used older generation GTX 1070/1080 with 8GB of VRAM for about half the price of the RTX.