Najafi Q&A: Associations and Foundations

We are a group of men who have shops. We hold charitable competitions through making people subscribe paying 10K IQD. Many people subscribe. Through a draw in front of everyone, one name is chosen and a monthly salary for ten years or a house is allocated to him. We deduct from the total amount some fees for the ones who work on that and for advertising and propaganda. We would like to hear your opinion in this regard.