I've somehow completed my model. Using aluminium wasn't as easy as I thought it would be. Firstly, the cutting was ok, but there were lots of sharp edges that gave lots of injuries to my hand while cutting it. Which was pretty painful.
Furthermore, it's difficult to stick on the wood. I tried using super glue but to no effect, it will come off immediately, so for some I just used masking tape, and to others, I used contact glue, which is SUPER smelly!! I get headaches after that.
Personally, I feel that my model needs lots of improvements, such as the additions of walls and pavements, but due to lack of time, this is the best that I can come up with. So, I really really need to have a better time management.