How I did the last 3 quests (as it was said,never speed up the day):
1. Buy 2 small stands in hill, fully upgrade them, set both 10 risotto, 69$. For school, all the same (risotto) but price 87$.
2. Go to HQ, buy all marketing upgrades, get faster workers, get radio for stands, get market.
3. For market, all the same as school
4. Finish 1st day, should earn you about 2500-3000$.
5. Buy beach in HQ, set 2 small stands there, then take a loan of 10000$.
6. Upgrade beach stands all the same as in school or market.
7. Finish 2nd day, +3500-4000$.
8. Go buy ship in HQ, set 1 small stand there with 10 ice coffee for 34$, upgrade it.
9. Finish 3rd day. +4000-4500$, buy 2nd small stand on ship like the 1st one.
10. Finish 4th day. Buy white paint for stands, buy 1 pedicab on beach, fully upgrade it (including radio), stock: 20 risotto for 75$.
11. Finish 5th day, should bring you 5k$ profit (yes,i am a tycoon), if not, dont worry, you will get it soon.
12. Go to bank, repay your debt (10k), take 25k loan, ignore warning.
13. Replace all small stands in beach,school and market with white fully graded pedicabs (do not touch hill), stocked with 20 risotto for 75$.
14. Finish 6th day. I got my 10k income here (hardcore businessman).
15. Replace one stand on ship with white graded pedicab, 20 ice coffee for 25$. Finish day.
16. You should have got the profit and income badges already, if not, try replace the 2nd stand on ship with pedicab, then you may buy bemo in HQ, and replace some pedicabs on beach or market with them.
17. Now you have about 7 days or so to get 200 goods a day (the king of marketing), just place at least white pedicabs (or white bemos) everywhere and set all prices to 0-5$ (5 places*2 pedicabs*20 goods=200).
This may be a bit luck based, but it worked 2 times for me, GOOD LUCK!
P.s. Prices partially taken from Reton8's walkthrough.