To help my partner who is trying to build our house and is finding it hard to afford a lot of unexpected cost

My partner has bought land for our forever home. The land itself cost everything we had, also living in Airbnb for the last year moving around the country as we have had nowhere to live, it has drained our accounts we are constantly sad and stressed with all the extra costs of living. We are currently trying to build temporary sheds to have somewhere to live. My partner has a teenage daughter who has special needs which makes things extra difficult.so can anyone please help us #struggling