I currently have a mortgage on a flat and I'm considering buying a 2nd home. I have about 50% equity in my current flat. The combined mortgages would fall within what I could realistically afford if I was getting a mortgage on one property alone, but I'm really not sure if there are mortgage companies who would be willing to spread that affordability across 2 properties as opposed to on one. I'd also be considering having a relative live in the 2nd property but not charge rent. So I wouldn't have double 'living costs' as such, just 2 mortgages with combined payments within my 'affordability' limit. Is this a nonsense pipe dream or do-able somehow?