I just need to write this out as I'm so depressed about our situation! me and my partner have 3 children. We where both on benefits but came off it all and recently become self employed earning what I would consider quite good considering our backgrounds and being quite young. We need to move as our house is awful for children, I mean really crawling with mould and fungus.
We've been looking for a new house, we've scrimped and saved up 6 months rent upfront as we're both newly self employed and mostly all of our bills are in cash including rent in so we don't have the proof in our banks to show our earnings (we've both started doing our accounts writing everything down in excel) so we know it's going to be complicated
We went to view a house and told them we have six months upfront and a homeowner guarantor. However they said our guarantor also needs to earn 36k a year! Both our parents are homeowners but retired or carers for their parents so we don't have that! We earn more than enough to cover rent and living expenses and we've worked so hard to get there! We're getting so depressed that we've done all this and we can't get anywhere. Working long hours and we're in the same situation 
We've tried going through housing associations but they're going through every hoop not to house us despite doctors telling them the house isn't suitable for children.
Thanks if you read all this and if anyone has any advice that would be amazing!