Buy Starlink and resell it. You will have free high speed internet plus you will have an additional source of income. 
btw. 5 Mbps is quite slow, after all, we are in the year 2024.
Yes, that can be a good source of income and at the same time can help him to have internet all the time. But, who knows if Starlink increases its plan value overtime when they see high traffic. btw. 5 Mbps is quite slow, after all, we are in the year 2024.
We all know that Elon Musk is a good businessmen and that's why there's chance that he may increase the value of plans overtime. By the way, I'm on a 10 Mbps Fiber connection and it works like a charm for me.