What challenges or opposition did Galileo face in having his theories accepted and why

Poorness is the one because he needs large money for his inventions and tools to use in them. He also have problems in securing patent protection and dealing with publishing pressure.

But the greatest problems is the opposition of his discoveries by the Catholic Church, they banned his books, they abstain him from teaching inventing, and writing. But as we know, a hero stands even on the hardest times