It does seems like a good scam idea — it may also help in getting the development permit from the city. I am not sure how the numbers would work out, since the office buildings are large and costly. I am not too familiar with this field, but in theory the bigger the housing development, the smallar would be the percentage of cost of developing the business park.
It may have worked out in this situation because cost of land may have been a lot lower as it is far from the city.
