I am a pensioner female, aged 76, I need a wheelchair at airports, and an end seat. I wish to spend approx 3days at the beginning of my tripin Perth, an overnight stop in Sydney, then on to Dunedin. I shall be staying with my daughter in NZ over Xmas and New Year, then back to Sydney for about a week. My time is flexible around these dates,and I need to do the whole trip comfortably but as cheaply as possible. I am wondering if the train from perth to Sydney may be cheaper than the flight. I shall be flying out and back to Manchester England.