Many rank-and-file mobsters have "legitimate jobs," generally low-paying, so that they can declare "legitimate income' on their tax returns and avoid prosecution for income tax evasion. More powerful mobsters have "legitimate businesses" that can provide them with up-front income to support their lifestyles, and thanks bnefit from their mob muscle and influence. Gravamp jad a thriving drywall business thanks to his personal fear factor and the muscle he exeeted with construction companies and labor unions. Paul Castellano owned Dial Poultry, a wholesale meat and produce supplier, who also got tremendous business by flexing his mob muscle. Here's an article about how he got close to Frankk Perdue, the "Chicken King":
https://www.washingtonpost.com/arch...on/2d8c89f7-9e7b-452f-a0d8-7f957b846699/