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Some people don't really know much about trading, they just hear from people that they are making money from trading, but they don't really care to do more research about it to know the risk that's in trading. It's kind of funny for a newbie that wants to borrow money from his wife to start thinking about profit already, if you want to start trading, you shouldn't be thinking about profit yet, you should be looking for the appropriate strategy which you will be using.
If am going to advice the OP, then I will ask him to return like $180 to his wife and then start trading with $20, after perfecting your trading, then you can source for your own money then start trading with it.
Taking a loan is not wrong but putting into the situation of being a newbie and having no trading experience yet, we already know the possible end. I believe that OP has the gut to trade but yes, thinking profit shouldn't be on the top of his mind as a beginner but rather help himself to learn first using a demo account than using the borrowed money to lose them all in order to gain experience.
Many people had come up with a decision to trade because of seeing on social media that many people got a huge profit. I'm not going to tell it was a lie because some did it well. But then, we can't assure ourselves to be like them as well knowing that it depends on us - our strategies and decision-making.