Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

How much does it cost to build a subdivision of houses on a large plot of land?
A bank may not like loaning money to you for this. That is one snag. You listed 500,000-600,000$ for a monster of a house (3000 sqft is over three times the average size of homes a hundred years ago). Add in the price of the land at 60K (600K divided ten ways). Where I live, there is a 15% VAT tax on new homes. I can't find out if California imposes a VAT tax on new homes. Anyway, returning back to the topic, because of the risk of loaning you 660K for a piece of land and construction, the bank may only let you borrow half or less of the final expected cost (not value). Another huge snag is that you say in a comment to quid "I came up with this conclusion after talking to someone who had his property built in early 2000s in bay area for that average price". Let's apply 3% inflation over 15 years to that number of 200$/sqft. That brings the range for construction costs to 780K-930K. Even at 2% inflation 670K-810K. Edit: OP later expanded the question making it an inquiry on why people don't collaborate to buy a plot of land and build their homes. "Back in the day" this wasn't all that atypical! For example, my pastor's parents did just this when he was a young lad. Apart from the individual issues mentioned above, there are sociological challenges that arrive. Examples: These are the easy questions.