These are typical homebuilder numbers. A lot of developers don't want to work with a market until the units are ready to sell. Most developers and homebuilders presell part of the project but not the whole project in case they need to make up margin. Too risky otherwise. It's still a very small market.
Development is time consuming and mistake prone.
Trying to do the design process themselves will kill most groups. They had been working together for 8 years before Wonderland got involved 3 years ago. Once organized it took only a year to get it built. They're a very strong group, very tightly bonded, but it cost them a lot of money to get there. Only 4 of the 25 units are occupied by people who were there for the design phase.