Breaking up the journey when intending safr distance

Q: A person travels regularly between PMB and Durban. He has a daughter in Overport where he stays occasionally and he knows that till this point, he is not a musaafir. 

However, when he leaves PMB with the intention of visiting family in Isipingo (safr distance), but only after staying the night at Overport (meaning he will only go Isipingo the next day), will he be a musaafir from the time he leaves PMB? 

If, as above, he intends to visit Isipingo (the next day) and reaches Overport, but then changes his intention and decides not to go (as the family member is not there), will he be a musaafir? 

Similarly, if he leaves with no intention of visiting Isipingo, but only decides to visit Isipingo when he reaches Overport, will he be regarded as a musaafir (since the total distance with Isipingo will be more than safr distance)?

Husband being forced to sign a talaaq document

Q: My husband's parents forced him to sign a divorce paper. They prepared it by themselves and he doesn't know how many has been written. He didn't have any intention for this. Is it valid? 

They threatened him that his mother will kill herself while his wife put a pistol on her daughter. He did not know how many times divorce was written because he didn't prepare and read the papers, nor was he willing to sign.

Minimum number of people for Jumuah Salaah to be valid

Q: The masjid in our area is fairly new. We have, for Jumu'ah, about just over a dozen musallis. It is a mixed congregation of Shaafi and Hanafi. Our imaam for Salaah passed away in September. Since then, while we are looking into appointing a new Imaam, we have invited other Ulama to conduct Jumuah. 

The last imam who came, informed us that our Jumuah is problematic as per Imam Shaafi, there should be at least 40 men. 

Is it correct? Or can we continue with Jumuah Salaah?