How to earn fast simoleons on the sims free play?

Note, I'm talking about freeplay. Not sims 3. If you don't know what freeplay is, it is different from other sims games as you can do whatever you want and it is for iPad iPhone and iPod touch.
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Ok, so I'm level 8, with 4 sims, two being married. I have 300$ and I need to get to 750$.Is there any fast way to get simoleons? I also have 1 LP as I just married my sims and the ring costed 3 LP.

Doing hobbies will give you quite a number of simeleons. Like searching for ghost or maybe carpenting. I use my sim to do carpenting in order to get money. To do carpenting, you need to build the community center. It's on the top left while facing the beach.build the community center, make 3 your sim to do that hobby since there's only 3 carpenting table there xD. And just keep them doing the 4 minute option. You'll get money every 4 minutes plus you will also unlock the carpenting table once you finish the whole set which you can buy it for your forth sim. Get it. It's like the more sim you have, the more simeleon you'll get in 4 minute. This is like my secret trick which i never told to anyone. Hope you don't tell this to anyone xD.