Complex sentence: Brown found it difficult to find a suitable replacement venue in New York, as some were booked solid, and others had owners who didn't want to anger the Knicks by opening their doors to a rival team.
Split into simpler sentences: Brown found it difficult to find a suitable replacement venue in New York. Many of them were booked solid, and others had owners who didn't want to anger the Knicks by opening their doors to a rival team.