We went in Sunday to sign the final change order for the house (we only had four, which I suppose is good). We had a custom option to remove a wall from the family room to the flex room to create an L-shaped family room and the original estimates ranged from $1500 to $2500. Luckily, it was priced out at just over $500, which means we have more room in the budget for everything extra we need to buy.
For example, window coverings. Our house doesn't have that many windows, but it sure will add up when you put blinds or shades on each one. Also, we rent a house now, and don't have any lawn care equipment. Our yard isn't huge, but we will need to sink a few hundred into a lawn mower. And things we decided to buy separate from the builder, like a garage door opener, appliances (all but the dishwasher and a microwave), and paint. They only offered the two types of beige.