Opening a sewage business

Q: I have recently been thinking about investing in the sewage business. My plan was to purchase two sewage tankers (vehicles) and signing contract with companies that need removal of sewage. The work that I want to do would be completely legal and professional. However someone told me that sewage business is haram in Islam which is why I want to first ask before making any step as I don't want to earn from a Haram source.

Obeying the husband

Q: What is the importance of a husband? How shall he be treated? I'm reluctant to obey him in every matter. I want to correct myself but I'm stubborn and a pampered wife. I want to rectify my amaal.

Tenant claiming the cost of renovations from the landlord

Q:

1. Our tenant is withholding rent at our business premises which he has vaccated, citing that he has done some renovations and wants compensation for same. Please give shariah ruling regarding this.

2. The tenant also sublets portion of the premises and collects rent. What is the shar'ee ruling on rent collected on portion subletted. We will appreciate a mutual solution regarding this issue.

Inheritance

Q: My husband has assets. He has two blood sons and one blood daughter. He now also has a stepson. Is the stepson entitled to any of his wealth after he dies unless otherwise stated in a will.