Hi GillinOz. I have just joined this forum so have only just come across your post. We emigrated to join our family in Australia about 3 years ago. It is possible to apply for a parent visa and your daughter can sponsor you. The bad news is that it will probably cost around 60,000 pounds for a couple and takes 2 years. There is a cheaper option at the moment, although the visa is soon to be withdrawn, but it does take a long time 15-20 years so the only real option is the Contributory Parent Visa 143. You can split the cost by doing t in stages and going for a temporary 173 first which gives you 2 years in Australia. You do need to pass the Balance of Family test, ie at least half your children need to be in Australia. If you look on the Australian immigration website www.immi.gov.au you can read about your options.
If you do think about it seriously I would advise that you go for a long visit first. I don't know where your family is in Australia, but the country is vast and each state is different. Bear in mind also that your family may move for work. In our case the family have been talking about moving for around 3 years but now look as if they are staying put for the time being in WA. We didn't buy a house when we moved over due to the dire exchange rate which fell the moment we set foot in Oz but also because it is very expensive to move due to very high stamp duty and moving furniture etc interstate costs as much as shipping it from the UK. If you read my other thread on the Chat forum you will see that our long term plan to be in Queensland did not work out and we have ended up in WA which is a completely different prospect and does not really suit us. While we love being near our grandchildren we feel we are not really living our own lives. We are weighing up our options at the moment as to whether we stay here, move to Queensland or in fact move back to the UK as we really miss the scenery and the culture.
Also be aware that Australia is no longer the cheap country that it once was. It is expensive to live here and you may not be aware that your UK state pension will be frozen when you leave the UK, ie you will not receive the yearly cost of living increases. It would be advisable to look at housing costs, utilities, shopping etc. something which you don't really do on a holiday. We fell in love with the area my daughter lived in until we realised that we couldn't actually afford to live there! It is also quite ageist so employment may not be easy to find.