Factorio runs great on the Intel iGPU. The AMD chip should have no problem whatsoever.

That depends. Some of their entry level models use some pretty slow drives.

If it’s purely about looks, they do make “dummy DIMMs” to make a four slot motherboard appear to look fully populated with just two actual sticks of RAM. 2x 32GB + 2x 0GB may be a better option than 4x 16GB to get 64GB.

Also, just in case it’s not clear 14th gen desktop is Raptor Lake refresh. Meteor lake is mobile only. The 14900k is pretty much just a 13900k with a new part number, so anything you see with the 13900k pretty much applies to the 14900k too.