Using Bay'as Salam to make a dropshipping business halaal

Q: I would like to know more about Bay'as Salam and how I can use this to make my dropshipping business halaal?

When a customer places an order, the supplier ships the product directly to the customer. You pay the supplier the wholesale cost of the product, and you keep the difference between the wholesale cost and the retail price as your profit. In a Salam contract, the buyer and seller agree on the price, quantity, and delivery date of the product. The seller receives the price of the product in advance, providing them with the necessary funds to produce the product. The buyer then takes delivery of the product at the agreed-upon future date. I would like to know if the above information provided on salam will allow me to use it in the dropshipping context as mentioned in the first paragraph.

Washing limbs more than three times during wudhu and water reaching the skin under the beard

Q: During wuzu, it is sunnat to wash the limbs of our body 3 times be it the face, hands or legs.

1. What if we feel that on 3 times we haven't fully wet the particular limb, can we then wash a particular limb more than 3 times? Will this invalidate the wudu or that just means we will leave the sunnat but wudu will be done?

2. As for cleaning the face during wuzu, is it necessary that water reaches in the gaps and the skin below the beard/moustache?

Wife following her mazhab after getting married to a Salafi

Q: We follow the Hanafi school of thought. However, my daughter married and her husband is now saying that he is a Salafi. We have never heard about this before. They join salaahs when they travel, make tayamum if there is no water whilst they on the go. Also, they read salaah while in a moving vehicle and if they feel its dangerous to stop the car. She is young and scared. Can you please help me with advice. 

Giving up drugs

Q: I am a practicing Muslim, I don't miss my salaahs or daily Quraan but I just can't seem to shake off the occasional drug habit. I make dua everyday for help. What should I do?

Moving in ruku and jalsah

Q: In the Jalsa or Ruku in prayer, we have to stop for at least one Subhanallah, but do we have to sit in Jalsa completely motionless, or is it okay if we sit for at least one Subhanallah but in that time our arm moved a little or our leg(s) moved a little? The same question is for Ruku too, do we have to be completely motionless, or is it okay that we be in Ruku for at least one Subhanallah but during that time we move a little?