Is the marriage contract considered valid if concluded at home by the marriage official (Ma`zon)?

Yes, it is valid as long as it is registered at the court.

I joined a savings club and was scheduled to receive the payout first. My friend asked to take my place in line, so I requested 50 dinars in exchange for letting her have my turn. What is the ruling on this?

 

 

 

 

 

هذا لا يجوز؛ لأنه أخذ مال بدون مقابلٍ له قيمة شرعاً. والله تعالى أعلم.

This is impermissible, as it involves taking money without providing something of value in return according to Islamic law. And Allah Almighty knows best.

I suffer from chronic asthma which requires ventoline inhale; which is an air causes the risperatory track/airways to expand. Am I permited to use it during the daylight of Ramadan? And does break one's fast? Noting that I can't go an entire day without using it?

Taking inhaler through the mouth or the nose breaks one's fast, because it is meant to reach the lungs which are part of the coelom. Therefore, whosoever use inhalers for couple of days is obliged to preserve his fasting and make up that day later. As for the ones the ones who need to use it every days are obliged to preserve his fast and feed a poor per day and the cost of feeding one poor is estimated (60) piasters for the year (1421AH). And Allah Knows Best.  

Is Zakah (obligatory charity) due on the money saved for marriage?

Zakah is due on the money saved for marriage if it reached the Nissab (minimum amount liable for Zakah), and a whole lunar year had lapsed over possessing it.