After moving in 4 Sims, it costs 5,000 to move another one in. Instead of spending 5,000, you can get two sims (I used male/female couples, I don't know if you can have a romantic relationship between the same sex) to move in with each other. You have to get their relationship status to partner, then you can move them in. Once you do this, go to the house of the other sim and sell all their rooms. (You will have to go under "construction" to sell the room). It will ask if you want to sell and add all the items to your inventory. If you don't want to add items to inventory, then cancel and sell items, then you can sell the room. After you do this, demolish the house. Then you can add a new sim to a house for cheaper.
First go To city population then rise the population. Have Sims plant something after that change the date or year go back to Sims and you have your money.
One of the most annoying things to me was the time factor -- you had to wait for EVERYTHING. However, I discovered time is device-side, even though the rest of the game is server-side. So if it takes four hours to finish building a house, for example, simply turn off the auto network time on your device and advance the time by four hours. Reopen the game, and wala! The building is finished. After you're done playing, even if you're months in the future, just turn network time on again, and you're good. The gameplay does not revert back, so all your progress using the time exploit is kept! Hope this helps!More Sims FreePlay, The Cheat Codes @ CheatListingsMore Sims FreePlay, The Cheat Codes @ AbsolutCheatsMore Sims FreePlay, The Cheat Codes @ CheatHappens