The Homeless Challenge is one that I'd actually say is a bit hard! As we all know, part of playing The Sims is making sure our Sims are happy, but it's a lot harder to do that when you don't have the typical creature comforts. Progress through each era- Prehistoric, Early Civ, Middle Ages, The Old West, The Industrial Age, The Roaring Twenties, and the Modern Day- by completing goals and unlocking new game mechanisms!.Move on to Early Civilisation, where your Sims can now build a house in the Roman Empire or Ancient Egyptian style!.Complete the goals in the Prehistoric era to move on ('Reach level 10 Fishing, Gardening and Handiness skill on the same Sim' is one of the 5 goals in this stage).
Sims can't have a 'house' they must live in a tent or on the land and can only eat food that they've caught or grown (fish, insects, fruit). They will start off as your prehistoric Sims.
Created by user Cloudseeker on The Sims 4 forums, this challenge is designed to start in the 'prehistoric' age, and takes you and your Sims throughout various time periods, ending in the Modern era. This is quite a popular challenge for The Sims 4.