Constructor Codes -

Hint: Get rid of black marks and get money:
If you are getting too many black marks from the council, get a level two house, and make the tenants "The Punks". After awhile they should start to complain about a hedge and will give you black marks if you do not drastically decrease their rent. Drastically decrease their rent, and you should get some white marks. Then, put their rent back up again. Do this repeatedly until you have no black marks remaining. Then, either replace them, agree to their demands, or make them have children. If you continue to do this, you will receive many white marks which can be exchanged for cash (100 marks for $10,000).