Work is work and there's harmony in it when the dignity it deserves is allowed to thrive naturally. The greatest teaching manual labor provides a contemplative practice is that there is no separation between work and prayer: work is prayer and prayer is work.
If you give your life as a prayer, you intensify the prayer beyond all measure. 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.