The way the "5 years" thing was phrased leaves so much for interpretation that it leads me to think that it's more likely than not just him trying to reassure the potential renters that there will be no construction going on for the foreseeable future like someone said.
But let's assume that 5 years is the estimate for the completion of the second tower and connector, for example, and that these are built entirely separate, and consecutively to each other, this would give ~3 years to complete the tower and ~2 years for the connector, based of how long this tower took to be finished?