Please note, this is my first challenge that I have created so please bare with me if it doesn't work out or is too easy/hard. Feel free to comment down below any thoughts, positive or not. Thank you!
Story:
One day while walking through town, you stumble upon a worn-out building. A rusty sign dangling from the top reads “ (insert your restaurant name) “ . The sign sways back and forth, eventually falling down right at your feet. Picking up the sign, you run your hand over it and then drop it to the floor. Ignoring the strange looks of fellow sims around you, you then head inside. A folded up piece of paper is at your feet, stating that it is a menu and all of the foods and drinks offered are listed on it. Glancing around at all of the dusty and empty tables, you are filled with something. Determination. With an old menu in your hand, you leave the deserted restaurant and head back to your house. You find a notebook and neatly write the name of the restaurant down, along with certain items that would be necessary in order to rebuild the restaurant. After calling some contractors, you close the notebook and head to bed. You fall asleep with thoughts of how long it would take to rebuild the restaurant.
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Goal: To create a successful restaurant and end up wealthy. The challenge is over when you have a five star restaurant and 300,000 simoleons.

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Setup:
Create one sim, either a young adult or adult
Buy or build any house as long as you can afford it (meaning no money cheats or free real estate for this part)
Get your sim a job as a chef

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Rules and Instructions:
Once your sim is level three as a chef, your sim receives a bonus of 125,000 simoleons. You then decide that it’s enough to finally start repairing the restaurant. Buy any restaurant as long as it is in the budget (125,000 + your simoleons) and furnish it.
No money (and free real estate) cheats unless specified
You are allowed to do whatever in your free time until you have your restaurant, in which you will be required to be at Sunday through Saturday
No mods that will give you unfair advantages
Your sim can have a relationship, but their significant other cannot move in until your sim has 100,000 simoleons after the cost of building your restaurant. If they end up pregnant they have to keep the child.

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Mini Challenges:
(Optional)
Dice: http://www.roll-dice-online.com/
Rambunctious Restaurant:
For each day you aren’t at the restaurant, your workers go wild. Roll a dice
If you roll-
1.Your workers were absolutely horrible and trashed the restaurant. Take 500 simoleons away from your money.
2.Somebody thought having a waitress strip (or dance) would be a good idea. The customers loved it and gave big tips. Add 250 simoleons to your money.
3. The critic came by and was furious with how he was treated. Take 1000 simoleons away from your money.
4.The critic came by and loved his treatment. Add 1000 simoleons to your money.
5.A homeless sim is outside your restaurant and your workers give him free food. Take 110 simoleons away from your money.
6.Nothing extraordinary happens

Critic Calls:
For each star rating you have, the critics views on your restaurant change.
One Star:
Each week the critic threatens to shut down your restaurant unless you pay them 250 simoleons, this continues to happen until you have at least two stars.
Two Stars:
The critic is still iffy about your restaurant, they continue to threaten your restaurant unless you pay them 175 simoleons each week, this happens until you have at least three stars.
Three Stars:
They are slightly satisfied about your restaurant, but think it could be better. Every two weeks, they want a payment of 100 simoleons, this happens until you have at least four stars,
Four Stars:
Finally the critic doesn’t hate your restaurant, every three weeks the critic pays you 150 simoleons for good work.
Five Stars:
The critic is in love with your restaurant and gives you 200 simoleons every two weeks.

What a Wage:
One of your workers complains about their wage and demands a raise or else they’ll quit.
Roll a virtual dice with only three sides:
1.You give them a raise and they don’t leave
2.You talk them out of it and don’t give them a raise
3.You refuse to give them a raise, stating that their wage is just fine, and they quit (fire them)

Rich Sim or Rich Food:
A wealthy sim comes in (ie. a Goth sim or any other well-off sim family) and eats at your restaurant. They leave a tip of… (Roll a virtual five sided dice then add the tip amount to your sims’ balance)
1. 75 simoleons
2. 100 simoleons
3. 125 simoleons
4. 150 simoleons
5. 175 simoleons

Spoiled Rotten:
Requirements: A rating of one or two stars.
A pesky infestation of cockroaches has found their way into your restaurant. Roll a five sided dice to find out the costs:
1. The infestation is caught quick so damage is minimal. Remove 25 simoleons
2. The infestation lasts for about three days, costing you 50 simoleons.
3. The infestation takes one week to get rid of. Remove 200 simoleons
4. The infestation takes ten days and is hard to get rid of. Remove 350 simoleons.
5. One of your workers finds multiple cockroaches and demands their paycheck, then quits. Remove 500 simoleons and fire a worker.

Sounds interesting. I may try it