Thanks for your feedback . The reason I am thinking to do this , is that I want to give my sister the first push to get on the property ladder . I am non national with almost 6 years working as a professional here in ireland . My sister is studying in Ireland now and hopefully in 6 months time she will get into employment as a doctor , then she can look after the mortgage on her own .
Of course SD is looked at , but after making the calculations , the difference of SD between FTB and STB (me) is almost 5k only , so that's not the main reason of my question , as I said i want to help my sister with a soft start , who knows may be by next summer the market will picks up and she won't be able to get a mortgage