Dow Stough, MD

From the photos, it is difficult to discern the donor area density. However, I would feel certain you will need more than one session, because your non-transplanted hair on the top of your scalp currently will fall, and you will want more grafting to support your transplant. Whether it be one session or two initially, after the fall of the existing hair in recipient area, you will want/need additional grafting.  

Yes, hair can be transplanted onto chest area. The only thing I would warn against is using valuable donor hair from the scalp on your body. If it is needed later for scalp hair loss, you will have a lesser amount to harvest. Your donor area is a finite amount, once it is removed, it does not grow back.

 

It is very important to cleanse the scalp as directed after a transplant. Bacteria, yeast, and other organisms can grow. The scabbing should definitely be resolved by this point. I would recommend lathering the scalp with baby shampoo, gently massaging the scalp with your finger tips- not finger nails, letting the lather sit for 10-12 minutes then rinsing with a slow running shower or cup of water. Repeat daily or twice daily until scabbing is resolved.

It is fine to stop minoxidil, but do know that any gains you made from using the product will be lost. After use of 2-3 weeks, it is unlikely you have had any growth or changes to your hair so it should not be a detriment to discontinue use.

I would recommend seeing a dermatologist for your hair loss. They can evaluate what type of hair loss you have and give you treatment options. Surgery is not always the best option for hair loss. Sometimes medical conditions cause hair loss and a dermatologist can sort through those causes  to give you answers.