You have probably already thought of this, but what about trying to yield more dwellings from the site? Or are you already at the zoning limit?
More units of a smaller type perhaps - drop the 3 beds to 2 beds, and add some 1 bedders?
Without knowing the area, hard to make a call as to whether this is suitable.
Other options - could the yields stack up if some of the units are NRAS, and hold them for a while?