Sorry, I guess I misunderstood, I thought you'd already bought the house, but it's good you didn't when it turned out to be so bad so that's good news
The place me and my live in that we rent is very bad too, and one of the workers that checked a problem out for us earlier said he knew it was bad since he was one of the people that made it and they were contracted to building it cheaply. There are half-inch gaps between panels and strips on the wall and we have tons of ants and silverfish all over the living-room, hall etc. and giant spiders too. Now we got a heat-wave nearing a tropical night (+20 C minimum for 24 hours) it's boiling hot, but in the winter it is freezing, especially on the floor and there are cheap small electric heaters so it's both extremely expensive and still far less effective than the normal hot-waver heating elements on normal houses, nuts. Technology is so advanced today that in DK they've made a test-house of wood (rnoamlly we use bricks, usually an outer and inner with space between and insulation between) that used paper-insulation and was built so air-tight that when placed in a test-chamber it couldn't measure anything and that place was high-tech, just can't remember where but probably the danish technological institute, and it didn't have any normal heating-system, just solar-panels on the roof and that was enough to power most if not all normal elecrical things in the house and it would be warm enough even in a danish winter, now that to me really speaks volumes of what is already possible, but isn't done.
My late dad had a saying "you can't afford to be poor" he knew from childhood that buying the cheapest usually didn't save money in the end but the exact opposite. It's not just initial cost but running costs as well, things aren't as simple as far too many people see it. And a how is a very expensive investment and is central to ones life and I'd rather take a bigger loan, if possible, and get a house made that was very self-sufficient using solar-panels, efficiently designed and constructed ventilation etc. and have low running bills, which one can't take a loan for, instead of buying a cheap place that was expensive always and had to be repaired and was in daily use still bad.
Best wishes for finding a good place fast, but even with that risk of being homeless, please remember that not checking and thinking things thrue can bite back hard! But I don't envy you your position of facing homelessness either.
Frank