Renting out to 3 adults

[Ashish Wa]

Hello,

I am a first time landlord and have been struggling to rent for 3-4 months. Not a lot of applications but rejected some out of caution. So this couple that now wants to rent has a service dog. Initially I wasn't really keen in renting to a family with dogs but since I do not have an option, I am thinking to proceed. Hoping service dogs are better trained. But they also want their brother to live with them. That guy also have a different last name. How do i proceed with that? I wouldn't want to loose this lead but also do the right thing. The couple has seen the house but the brother wants to see it now. Should i tell them that its going yo be extra $200 for the brother since he doesn't seem like a brother due to a different last name? Please suggest