I have a great way to get more simeleons! This cheat works on the new swimming update on The Sims Freeplay.
This works every time.
1. Log into Facebook on the app
2. Go onto the furniture store and click social
3. Buy the blue robot thing and the radio
4. Go onto the home page and log out of Facebook
5. Sell the blue robot thing and the radio (the blue thing sells for $1000 and the radio sells for $1250)
Now your rich! Usually I fill a whole room to get more money. If it doesn't work you have completed it wrong.
Hope it works for you!