Well since I started this thread things have changed! We are now actually buying a house. Meant to get the keys in 2 weeks.
Mental!
Because we were homeless we got offered a council house, which meant we became eligible for the LIFT scheme ( government shared equity in Scotland) and so hurray!
So we started looking, got excited, then realised that the LIFT scheme wasn't going to work for us, as the calculations, stipulations and restrictions on what you could or couldn't buy priced us out of the areas we can affordably live and work ( without changing jobs, life entirely). We had 12 weeks to buy somewhere that had to be exactly 155k but must be 4 bedroom and must be a house rather than a flat. Which would have meant us moving 30/40 miles outside the city we live and work in, essentially meaning we'd have to have got new jobs as the commute time and money wise would not have been doable.
So we started trying to work out what to do, accept a council house ( too small for us ( max 2 bedroom for 2 children) and no choice of location, and therefore schools, but beggars can't be choosers) and try and save on the lower rent. Buy a house through LIFT, and change jobs and our lives completely by moving to an area we didn't want to live. A lot of worrying and soul searching resulted in an unexpected phone call from a relation who had heard through family of our position and wanted to lend us a deposit. We had no idea she had the means to do this.
So the house we're buying now is because this relative has generously lent us 15% deposit on a 120k 3 bed ex council flat. It's not the biggest or best flat ever, but it's warm, watertight, big enough, close to our jobs, near good schools. So we're very very happy. It needs a lot doing to it, hasn't been renovated seemingly since it was built in the thirties, but fuck me it'll be ours and ateast I can paint a wall and buy a bed!
So in conclusion, we've been very lucky to be able to buy what we wanted, with small compromises through the help of a relative. But with bigger compromises we could have bought, or been in a better position to save. So the situation wasn't as impossible as I first thought. So my advice would be to those in the same position, take some chances, talk about your position ALOT, explore as many options as possible. There are other options out there.