Every Sim I found said they were rich. On thing to note when your Sim marries a rich sim in this game they bring nothing to the family inventory, there is nothing in the backpack, and they only get about 1000 simolions as wedding gifts.
My founder finally met someone that didn't say he was rich a Randell something, he's a paper delivery person. Her clock was running out so I got her pregnant. Right before the baby was born she found out his last trait SLOB, then got the option to move him in, I decided not to move him in.
Hope, my founder, turned elder; the next day her daughter Randi turned teen.