iklboo 
Don't worry binary the next house you buy you can get for free, you have to stand in a certain place where you can talk to purchase your house but also with a side glance open a cupboard, you initiate the conversation that you want to buy X house, then open the cupboard and stash your cash, the game registers you have enough money, but doesn't notice it disappear mid sentence so the transaction then completes, after all the dialog you just open the cupboard and take your cash back out
Oh and save the game just before incase you dont manage to do it first time.
MephistophelesApprentice if your girl friend hasnt triggered the drangons in the story line yet, she could collect loads of shouts from the Dragon mountains without getting killed.