Hi Everyone,
I tried this level over and over again, several times I was just a couple of seconds too late to get the expert-score, sometimes almost a minute, very frustrating, but now I got it

.
This is how I did it:
- Choose a level where you have a lot of kids at the beginning, best 3. This way you only have to advertise for scuba diving once. Make sure you can advertise 4 times total. When you don't have 10 scuba within expert score, just try again, its possible to do this with 1 advertisement only.
- Build cocktail bar inmediately, and advertise on scuba.
- Try to make a lot of chains, this way you generate the extra money.
- Upgrade cocktail bar as soon as possible. Start to advertise as soon as the scuba advertisement is finished.
- Buy 1 extra cocktailbox, and refill the bar when its empty. Make sure you have first fully upgraded the bar. (3 times, 500, 300 and 500).
- When the first advertisement is finished start a second for the cocktail bar.
- When the advertisement for the cocktail is (almost) finished, start building the barbecue, and upgrade twice. Make sure that you only sell fully upgraded meat. Otherwise you don't make enough money. What is did: I started the advertisement before I had enough money for the second upgrade. By the time they actually wanted to have some meat I had just enough money to upgrade the barbecue fully.
- From now on, build the sandwich bar as soon as you have the money. Concentrate on tasks that make a lot of money (cocktail, meat, entering new guests) Don't clean or serve water if you can do tasks that make more money, but don't forget the scubas!
- I had 3 seconds left, so it's not easy!
Maybe there are some better ways, but I haven't found them..Try this a number of times, make sure that you are fast and smart, and it will work
Good luck!