It seems like your dad doesn't want two tanks in that perticular area. Is there a happy medium room that isn't as busy as the garage door but is busier than the deserted room? If you are allowed to, try to move the female betta into your room. She may not see you every hour, but she would see you every time you enter your room. I have both of my 5 gallon betta tanks at the foot of my bed so I get to see them each day. That makes me a bit biased towards bedroom tanks. XD
However, I'm not sure if bettas benefit from people watching. I know they don't have a long enough attention spawn to get "bored" in the human sense of the word. But they do benefit from exercise and flaring, which would involve being in an area that stimulates their senses enough to make them swim around and flare at stuff. So, I guess being in a deserted area wouldn't lead to illness directly but being in an area with activity could have health benefits.
I live alone so when I'm out of my apartment for work during the week or doing something during a weekend, my fish don't see humans until I get back. So fish don't need the level of stimulation that dogs and cats need, but you can't treat them like a decoration either. If you do put the female in the deserted room, dropping by to interact with her for 10-15 minutes should be enough for the sake of exercise.
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