Complex sentence: Although Houstonians wanted to keep the Oilers, residents were wary of investing more money on a stadium so soon after the Astrodome improvements, and the city was still struggling to recover from the oil collapse of the 1980s.
Split into simpler sentences: Although Houstonians wanted to keep the Oilers, they were leery of investing more money on a stadium so soon after the Astrodome improvements. The city was also still struggling to recover from the oil collapse of the 1980s.