Prayer: If one moves near Tehran but can’t stay 10 days to make it watan, what’s the prayer and fasting rule there?

Practical Laws of Islam as per the teachings of Imam Khamenei

Prayer: If one moves near Tehran but can’t stay 10 days to make it watan, what’s the prayer and fasting rule there?

English:

Question #683:

A person’s watan is Tehran. Recently he decided to take up residence in one of the towns near Tehran and make it his watan. But, since his daily business and work is in Tehran, he cannot stay in this city for ten days, let alone six months, so that it may become a watan for him. He goes to his work every day and returns at night to this town. What is the rule of his prayer and fasting in this town?

Answer #683:

For a place to become one’s new watan, it is not a condition to stay there continuously after deciding to consider it as his/her watan and place of residence. Rather, after selecting a place as a new watan and residing there with this intention — even only at nights — for a while, it becomes his/her watan.
Also, if he does the acts that normally one does so when he wants to make it as his watan, like preparing a house and choosing a place for work/business, it is considered as his watan even before staying there for a while.

-Imam Khamenei, Practical Laws of Islam, Importance and Conditions of Prayer