The one problem with the city rp servers is that there's nothing to do once you succeed.
In Iban's RPG, I ended up becoming an official after three to four days. By day five, I had a running shop. By the end of the week, I had a running (charged) teleport service between the three cities which had to be built to create enough lots for everyone. Then I had nothing else to do. I was making thousands (25k in bank) and effectively controlled the entire transport service. There was nothing else I could achieve or spend money on, without making more back. Crime and weapons would cause me to be jailed and lose everything, but it had no real interest.