LLC costs $800 per year to pay the government. Also some other effort and expenses for tax filing, separate bookkeeping. That’s the only extra cost I can think of.
Its main benefit is asset protection and remove personal liability. For a corporation, they can fine, but they can’t push a bogus criminal or civil investigation into the person. I heard that government sometimes uses a very minor offense and then abuse its power to investigate every detail of your personal life in order to force you to pay a large fine.
LLC provides not only asset protection, but also legal protection. Without corporation structure, many CEOs and VPs could be destroyed personally and even put in jail.
For example, if your garbage bin overflows and causes a violation. Government can use this minor issue to launch an investigation of every aspect of your life and force you to spend tons of time and legal fees to defend every detail of your life. Then use this huge burden to force you to agree to pay a large fine, or agree to give your house to government for low income housing or other use the public will be delighted