Hey here are some tips to over come the game.
To get easy money, start the day and press "Skip". Note: The outcome is random and you will still need supplies.
Do not put anything in your recipe. The sales may be slow for a few turns, but you will soon be raking money in.
To make money easily, use absolutely nothing in your recipe (0 lemons, 0 sugar, 0 ice). However, you will still need to buy cups. It is also recommended that you do not rent anything. Stay in the suburbs. Also, if you want to advertise, you should probably do it for $1.00 to $3.00 per day. Whether you advertise or not does not really make a difference. If you want to upgrade, the only things that are worth it are the freezer and the cash register.
Hint: Recommended recipe and prices
On warm days, the correct lemonade recipe is 8 lemons, 4 cups of sugar, and 3 ice cubes. When it gets cooler, remove some ice cubes from the recipe. When it gets as cold as 10º to 20ºC, lower the price to at least $0.50. Only buy the ice in the amounts that you need, as it is only good for a day. For the other supplies, always buy in bulk when you are low on them. This will help you in the long run. Invest about $3.00 per day on advertisements; people will visit your stand, but the lines will not get so long that customers will leave. To move up to the next level of rent, adding a 0 to the daily rent. That will tell you when it is appropriate to move up. Buying new accessories is very helpful, but some are very expensive and are not worth your money.