Unnecessary possessions are unnecessary burdens. If you have them, you have to take care of them! There is great freedom in simplicity of living. It is those who have enough but not too much who are the happiest.
To attain inner peace you must actually give your life, not just your possessions. When you at last give your life -- bringing into alignment your beliefs and the way you live then, and only then, can you begin to find inner peace.
The purpose of problems is to push you toward obedience to God's laws, which are exact and cannot be changed. We have the free will to obey them or disobey them. Obedience will bring harmony, disobedience will bring you more problems.