If u want more money to Build a house with all u have to do is to before u build the house or the family at the neighbourhood screan choose a a family that was all ready there when u first started the game( and U don't mind deleating) click on them and press evict family (not deleate or it won't work) then go to the estate office located at the bottom of the screan click on it and see the family u just evicted (if u have evicted a family before it will be in hear) now if ur family u evicted has less money than 20 000 pounds then u have got less money rather than more but if ur family has more than u have got ur self extra cash . Next click on the family and press edit family then u will go into the crate a family screan. Now simply delate all the members of the family ( eveything will be deleated apart from there money) now craeted ur family and press done when back at the neighbourhood screan click a lot to move into it would be easyer but u dont have to . When u build it u will find u will have more money than the set amount of 20 000 .