Rules applicable for a place to be regarded as a masjid

Q: I have a few questions regarding masjid. 

1. What are the requirements for a building to be called a masjid (and subsequently all the rules of a masjid must be followed)? 

2. Do the rules of a masjid apply to a musallah? 

3. Can there be a masjid in a non-Muslim country? 

3a. I have heard that in Canada a building is not owned permanently by a person and the government can take control of it (either any time or a lease of 99 years apply), so can there be a masjid in the aforementioned case? 

4. If one has taken upon an item of the masjid for safekeeping, can they personally use it? It was bought by the masjid money.

Selling one's share in the business obtained through inheritance

Q: 

1. My mum is deceased 3 years. In her inheritance, she has left behind a business. I want to sell my share of the business. The executors say that I have to sell it in the family and not to any outsider as its a family business partnership and part of the estate. Is this condition valid? 

2. Do they have the right to stipulate the price or can I sell it at a suitable price? 

3. As far as distributing the estate, how long does one have to wait, as the executors say that they have received monies from the deceased investment but are still investigating details.?

4. Is there any punishment or effect on the deceased if there is delay in winding up the estate? 

5. Is the inheritor being difficult or disrespectful in requesting their share of inheritance?

Being able to keep the qadha fasts after fidyah was given

Q: When a person became baaligh, he was not allowed to fast by his mother due to him being asthmatic. His mother would take out fidyah for him each year instead of him fasting. This carried on for ten years until he got married. After marriage, his wife told him to try fasting, and he managed and has been fasting ever since. Now he has reached old age, and he will not be physically able to fast the ten years fast that he missed. 

1. Will the fidyah given by his mother while he was young be sufficient as compensation for the missed fasts? 

2. If not, what can he do now to compensate for the fasts missed?

Earning the reward of two accepted Hajj for one visiting Madinah Munawwarah after Hajj

Q: Is it permissible to quote the following Hadith regarding the virtue of visiting Madinah Munawwarah, “Whoever performs Hajj in Makkah, then he comes to (visit) me in my Musjid (in Madinah Munawwarah), then (the reward of) two accepted Hajj will be written for him”. I found this Hadith mentioned in Fazaail-e-Hajj of Hazrat Shaikul Hadith Moulana Muhammad Zakariyya (rahimahullah). Some people have mentioned to me that this Hadith is a fabrication.