Im about to star making a adult game 3d on unreal ..I have a 79503dx rayzen 128 gb ram and a gpu 4070 ti super 16gb , any suggestion is appreciated at this point
What kind of suggestion you are looking for ?. Your rig good enough how ever bigger ram is better and don't bother other than nvidia.
You still need daz3d, you stil need transfer daz assets to unreal with dings and dongs and still there is no one click solution after 5 years. You have to create your workflow.
UE asset store has lots of casual homes with interrior. you will spend 100 to 500 usd to buy some environmets. (there is pirated ones however unreal moves so fast old versions does not play nicely, but static envionmens can upgrade via migrate content)