Complex sentence: Facing political opposition and the severe fiscal crisis of the 1970s, the City and State eventually chose the rail yard site when the 44th Street site proved to be too expensive, although Trump's offer to build the convention center was rejected.
Split into simpler sentences: Facing political opposition and the severe fiscal crisis of the 1970s, the City and State eventually chose the rail yard site when the 44th Street site proved to be too expensive. However Trump's offer to build the convention center was rejected.