If they can't take it away from you and sell it for a profit, they are not interested.
I dont agree.
- They are lending you money to build an unusual house.
- If things go wrong they have the right to seek reimbursement
- That right usually means selling the property as it is.
- earth houses may not be as easy to sell as a more conventional house
- they do not need to pick it up and cart it away.
You have made a choice to build what they see as an unusual home, they are making a choice to stay away from financing it
because they are worried it would not sell if you cannot repay the loan..
Its straightforward to them.