With pre-construction pre-public projects people save thousands of dollars before the project gets introduced into the public, and once it it is ready you also make money on the fact that you had your money locked in for a specific period of time (depends on the project, but it could take a few years to complete), and on real-estate market appreciation.
Ill give you an example; a client of mine purchased a house in Richmond-hill (pre-construction) about 2 years ago for about 450,000$, his house took about a year to build after which he moved in.
At this point he lived in the house for about 8months, and decided to list it with me. The house is worth about 640,000$ today.
If you can show me in any other investment that has that kind of return on the 10% that he initially put down than please do share with me.