No one should undertake a substantive life of prayer and devotion thinking it will make them holy, eradicate all suffering, or assure a comfortable, successful life. In no way is this what following Christ entails. This is just an attempt at gaming God, and it treats prayer as a form of magic. Thinking that God must do certain things for me because of what I do for God is an absolute and egregious blasphemy! God does not bend to my will or yours; as followers of Christ, we are supposed to bend to his.