1. doing dhikr while lying down allowed? 2. should I pray Maghrib first or eat iftar first if food is already served? 3. Can one wudu be used for multiple salahs or is fresh wudu needed each time? which is better? 4. I got items for free can I sell them by setting a price? is the earned money halal?

1. Yes. Aishah radiyallahu anha said that the Prophet sallallahu alayhi wa sallam would remember Allah at all of his times (Muslim) 2. The Prophet sallallahu alayhi wa sallam said, when the evening meal is brought, begin with it before you pray Isha, and he said there is no prayer in the presence of food (agreed upon). Therefore you eat then pray. 3. Both are allowed and the fresh one is better. 4. Yes you can.