Getting married in a family that is involved in bid'aat

Q: Please advise me, I come from a tablighi family background. I have met this girl, she is hard core sunni. The entire family, mazaars salami etc. Is it ok to marry into this family? I don't follow their stuff rose water and feather duster and standing for salami. I wasn't brought up to. Please advise me on what to do. Also they don't want to let us get married but instead wait a few years. We both over 20 and know each other for 3 years. 

Travelling without a mahram

Q: I am living in Riyadh. I want to go for umrah from Riyadh. My brother is in Makkah and my sister is in Jeddah. Can I travel for umrah with my children by flight from Riyadh to Jeddah and perform umrah with my brother? He will pick me up from the  airport. If I stay for three to four days in Jeddah, from their can I perform umrah? From where must make the intention of Ihraam?

Shariah compliant banks

Q: There are many muslims turning to shariah compliant banks.

  1. What is your view on using these kind of banks for buying or building a house? Would I be allowed to buy a house for my family using this service?
  2. I have some money that I would like to invest in using their investment fund. Will this be permissible? They call the percentage they put in profit not interest. I want to make sure.