Simoleons (§) are the in-game currency. You spend simoleons on food, items, bills and other things. Basically, the more simoleons you have, the more easier the game is. Don't worry, this is how to earn some §§§!
1) Cheat #1
Hold down CTRL SHIFT C on your keyboard and type in 'motherlode' (without the '')
2) Cheat #2
Hold down CTRL SHIFT C on your keyboard and type in 'kaching' (without the '')
3) Cheat #3
Hold down CTRL SHIFT C on your keyboard and type in 'rosebud' (without the '')
4) Cheat #4
Hold down CTRL SHIFT C on your keyboard and type in 'money 2000000' (without the '') [Replace 2000000 with the number of money you would like. testingcheats true may need to be used for this cheat to work]
5) Getting a Job
Check out the Career Tracks page on this guide to see which jobs pay more.
6) Gardening
Each world will contain a gardening area. Harvest the plants there and plant them at your House. Once the plants have grown, you can sell the harvested items.
7) Fishing
Around the edge of the island, there will be a fishing post. Click on that to start fishing. You can sell the fish and other items you get in your inventory. The heavier/rarer the fish are, the more they'll be worth.
8) Painting
The easel may take a chunk out of the household budget, but you get more back than you paid for. Each time you paint something, the next painting will be worth more than the last. Also, it help with the painting career.
9) Writing
This way is a bit more expensive as you need a computer to do this, but the more books you write, the more royalties you will earn.
10) Programming
It will take a while before you can do other options than 'Practice Programming' but after that, you'll have options to 'Hack' to earn money and 'Develop Mobile App' which generates around §100 per day (this may be for computer career only)
11) Entering Novice Tournaments
Every few hours or so, you'll be able to enter a Novice Tournament. You pay to enter the tournament then you can win money, but sometimes, you get nothing.
12) Collecting
It takes a bit of luck to make lots off of this. Repetitive digging, but you'll be able to make a few thousand off of this.
These 12 options will surely lead your family from "Rags to Riches"