icistarr, I finally finished 31 in expert level, thanks for the tips.
Here goes your tips for level 34.
You need 7 apartments, 2 of them 3 star and the rest 2 star.
Build an apartment on the top left of HQ. Now leave two slots for workshop and build another apartment on the right. Here is a trick: delete two slots of the road at the bottom the two slots that you intentionally left empty. It doesn't break the transportation. When you do that you have two 2X2 slots. Build a workshop on top and a shop underneath.
You have to buy one of the mansions on the bottom right of the screen, and preferrably the one on the left. So as soon as it is on sale and you have enough cash you should buy it. It depends purely on luck when you can buy it and it is critical for final success. This may change the order of actions explained below.
Delete all the decorations.
Try to build a second shop as soon as possible. A profitable one can be achieved if you are able to buy the mansion on the left. You can again demolish the road underneath the right mansion and two more slots towards left. You again save two 2X2 slots where you can build a workshop and a shop on top of each other. Don't build that workshop right away, you will need that when you build other apartments.
If you have already bought the mansion on the left, demolish it as it is standing on premium land. Build two apartments side by side. You can build another one on top of the right mansion, where you deleted a park (or statue, I don't remember which).
So now you have 5 apartments.
Next step (or if you still couldn't get the left mansion do this before the above step) is to build an apartment to the remaining slot on top right of HQ. You can place another workshop to the right across the road where you have deleted a fountain.
Extend the road on the top most slot and there you can build your final 2 more apartments. Remember you have to get 5 of them 2 stars and 2 of them 3 stars.
As usual keep track of sales as you will need alot of cash for upgrades. Buying the right mansion on the bottom of the screen early helps a lot, as the apartments generate much more cash.
Good Luck!
ps. I'm now stuck on 38! Any help or tip can save my eyes