The main concern with buying in a condo project that has a lot of rentals or lots of units owned by one owner is a financing concern. Most banks will not lend money to a condo that has lots of rentals or a majority owner. Some banks will do a portfolio loan, where they hold the mortgage in house, but there will be a bump up in interest rates under that scenario. Since it is a financing concern, it also can become a resale concern. If a property is more difficult to finance, the number of suitable buyers is smaller, and this ultimately reduces demand. I think over time banks will become less regulated with condo rules, but it still needs to be a concern.