You're talking about a $50 investment and you're talking about real estate? As crazy as it sounds, no investment will generate much profit with $50 of capital. You need more money, I think if you don't have money to invest, it's better to focus on increasing your monthly income, if you have enough money left for living needs, then think about investing.
Maybe there are also real estate investment that works like a pool same to others? If they can gather a lot of $50 from different investor, that would still be a lot of money which will be enough to buy a real estate. Once sold, the profits will then be divided to all investors. If he wants to, there are also cryptocurrencies.
What is better about them is that they can be cheaper and he can own these cryptos in his own, so he can enjoy all the profits that he can get. It is possible to get wealthy by investing just a very small amount in crypto. This is why many people are attracted about them. It is also possible to build more money from a small capital outside cryptos but they may only take more time.