Why not telling the whole story first? Why would your relatives not buy that house outright? You do know that taxes are due on profits regardless of whether you manage your relative's fund or they manage it themselves. What's missing in your story?
Well if I am self employed, they don't give me a mortgage or car finance unless I have 2-3 years proof of income and I don't have that. However, my relatives do have income and they can be approved for the mortgage,car finance