Hochdeutsch is not only for rich people.
Itīs an accent. Hochdeutsch is the "normal" german, that you find in an english-german/german-english, spanish-german/german-spanish, french-german/german-french and so on... diktionary. Or in a book, movie or what else.
Yes, i know, but you canīt chance it.
Bavaria belongs to Germany. But it WAS own. From 555 to 1871. Since 1871 it belongs to the German Reich. Today Germany. Since 1949 it belongs to the Federal Republic of Germany.