Yes
If the marriage is legally recognised in Australia and she has Australian citizenship then yes you will get Australian citizenship.
In Australia, a marriage performed in another country is seen as legal if the marriage is legally recognised in the country in which the marriage was performed and if the marriage would have been recognised as legally valid if it had of taken place in Australia.
Yes, the marriage is legally recognized in the United States.
Marriage is a wonderful event. Yes, if a female US citizen legally marries a non US citizen in the state of Michigan, they are indeed legally married.
Yes, assuming you were legally able to be, and legally married. With very few exceptions, a legally binding marriage performed anywhere, is recognised by the U.S.A. as a legal marriage.
three months
Yes, a marriage performed in South America will be honored in the U.S., with the exception of gay marriage- which is not recognized in the U.S. If you mean a marriage in the U.S. between a citizen and an illegal, this marriage will also be recognized, but again, not for gay marriage. Be aware than simply marrying a citizen doesnt grant you legal residency
There is no requirement for the witness to be a citizen. As long as they are legally an adult it is sufficient.
The Australian Government currently does not recognise same-sex marriage, so at present it is impossible to have a legally recognised same-sex marriage in WA. However the Australia Taxation Office now recognises same-sex de facto relationships, which can get you some of the tax benefits associated with de facto relationships.
In countries, states where marriage of same sex partners is legally recognised, there is no difference in the treatment of the partners as compared to a heterosexual marriage partnership.
No. Every way of becoming legally in the country reqquires a fee of some sort.
If you were married in a ceremony and in a manner that is legally recognized by the government of the Bahamas, then you are considered to be legally married anywhere -EXCEPT- if you are a US citizen, and your marriage violates the laws or statutues of the state in which you legally reside ("gay" marriage for instance) it is not a legally recognized.