You have to take in to account other aspects of the hosting machine and not just memory / internet speed, such a CPU, SSD and such. The better the machine the more players it will be able to host at a smooth rate. JC offers a good hosting solution which you can have a look at:
On your other note I don't think "creation system add put the eyes, hair, color" will be added to the core build, this is something that would need to be done when the source is released.