Do I get a refund, if my visa gets rejected?
The visa application charge does not usually get refunded if the same has been rejected or in any case you decide to withdraw your application, so you should be 100 percent sure before applying for this visa and are convinced that the process will be successful.
How long does it take to get this visa grant?
The Family visa application is evaluated considering several circumstances and the requirements of the applicant are checked thoroughly for this visa, then after assessing your application it might get rejected or be placed in the queue and grant will be provided once your application gets on the top of that queue
Can I apply for this visa while I am in Australia and for how long it lasts?
You have to be outside of Australia to lodge an application for this Parent Visa and also when the visa grant is provided and this visa is indefinite i.e. you are allowed to stay in the country permanently after obtaining it.