Performing the Sunnah and waajib Salaah when one is a musaafir

Q: I work in a hospital, Peterborough, UK as a medical consultant physician which 58 miles away from my house, Nottingham. I stay in hospital accommodation for 5 nights and I return to Nottingham for 2 night. Whilst in Peterborough I do attend the salah in jamaat in the local masjid, Peterborough for Fajr, Asr, Magrib and Isha.

1. With regards to sunaah and wajib do I have to do full as a mukim?

Besides, during zohr prayer I cannot go to the masjid but I do salah al Qasr if other people are not around in the hospital prayer room. I recently come across a hadith in Arba'een of Imam Nawawi RA that if a person is punctual with four sunnats of zuhr and two thereafter, Allaah will make hell forbidden for him. I just feel that I am missing this great blessing if I do salah al Qasr during zohr time.

2. In light the above, can I perform four sunnats of zuhr and two thereafter, in order to derive the above benefit? Mufti Sahib I would appreciate if you could give a comprehensive fatwaa.

Impermissible business transaction

Q: A approached B to finance the purchase of a house which he did not see for 1.25 million rands and A agreed to buy the house from him at a higher price. He also borrowed 150 000 for transfer costs and renovations and this amount was included in the repayment of the house. The repayment price was worked out according to bank interest rates of 12% per annum with a total amount agreed upon. It was also agreed that should the payment be made before the 7 year agreed period then the total repayment will be less than the agreed amount, it will work out pro rata.

1.What is the shar'i status of this transaction.

2.What should be done to correct it.

3. Payment have already been received for 1 and half years, how should that be rectified.

Giving sadaqah

Q: I am a student with only a small income from a part time job, mostly living on scholarships and financial assistance from family members who support my studies. In this case, will it be ok for me to give money to sadaqah? Or would that be disrespectful to the people who give me money to support my studies?