Unfortunately this is the case with most rappers who stunt on IG. Excluding the dudes who move crazy units (which is not really all that many these days), unless they're independent and touring like crazy, they're probably not as rich as you think.
Rappers lie like crazy when it comes to how much they get per show, too. Show money is GREAT if you're relevant (hence them trying to floss on IG to their "fans", they gotta keep up the image or else they'll be presented an application for Larry Holmes Gardens), but if not, you're not out here eating all that well.