I will be applying for their Family Sponsorship any time this month. After that's done, they'll submit their documents for a TRV hoping to get the 10 year multiple visa (Indian Nationals - Elderly Parents). I would like them to stay with me for longer time e.g. 2 years in a row. Then perhaps they can go out for vacation to India or US for a month or two and then come back. That's the plan.