To have a 9-foot sofa in a small room can be kind of treacherous.
Avoid spending too much on one thing.
Be judicious with your budget and buy things that are going to last.
People get trapped in the way things should feel and less focused on the way things should function.
People buy very badly made furniture and fabric. Instead, buy a beautiful dining table, well-made upholstery. It's almost like dressing for success.
Think of how much furniture you need. What's the best way to have it be functional in a great way? If it's in groups, define it.