is there a way to increase my wharehouse without going bankrupt. i don't and can't get the gold coins. i really need more space can't do anything or buy anything...........no space and can't buy what i need for room?

You can sometimes find the blueprints to the Warehouse while exploring for 5000 silver coins. You can also head over to the item trades and see if you can purchase the blueprints there.  They are usually cheaper, but neither of those ways require gold coins.

thank you Cheese. it would help if i had space in my warehouse now, and enough silver coins to get the blueprints. much appreciated