"And it's just not going to be feasible much longer."
In the 60's so many buildings were erected on the campus that further development was no longer feasible.
The navigation of rivers and canals was no longer feasible.
In the 1969-1971 period this was no longer feasible.
Because the new program has more inputs, the slide rule approach is no longer feasible.
In the 90's, the conventional wisdom holds that it is no longer feasible to build a major drug company from the ground up.
His old apartment was no longer feasible, because it wasn't equipped for wheels.
By the time we received permission, the neighborhood concept was no longer feasible.
If the plan was downgraded any further it would have been no longer feasible.
In fact, even building a new runway (or expanding a current one) is no longer feasible.