Few things. He's under no obligation to give his mom a place to stay if she has the means for her own place...which she does, since we know she kicked him out of it at some point before the fame. If his mom was struggling then sure, I think you gotta help your mom in some way; doesn't mean she can stay with you forever, but you gotta do something right.
All that being said, throwing your mom out your place and turning it into a social media bonanza is disrespectful and makes you look crazy. This is dumb shyt and just another example of behavioral failure from these dudes.
Finally...that's not his house brehs. He doesn't own his cars and he doesn't own his "house." Artists have houses and condos rented to them all the time. And I guarantee you the monthly total is automatically added to his advance, which is a loan he pays back via tour/club appearances and digital sales. He's spending money and laughing and smoking while running up a tab. He will never be free of that shyt. And in a few years when he loses "his" house, I wonder where he's gonna stay...