The big advantage of the public limited structure is that you can leverage it to raise capital from the general public through shares. This would, however, require listing on a stock exchange. All public limited companies can issue fixed deposits, debentures, convertible debentures to the general public.
Public limited companies need to disclose their audited statement of accounts, inform the regulatory bodies of any structural change and hold annual general body meetings for all shareholders. It's tedious but these compliances bring a public limited company a great deal of credibility to the organisation.