Complex sentence: The hotel attracted a great number of people in its first 2 years, and luckily the Seelbach Realty Company--formed in 1902 before the property purchase--had been planning from opening day to expand the hotel.
Split into simpler sentences: The hotel attracted a great number of people in its first 2 years, leading to a need for expansion. The Seelbach Realty Company (formed in 1902 before the property purchase) had been planning from the opening day to expand the hotel.