Elon and his personal fortune from Tesla, SpaceX and other ventures, is one hundred times more than every broadcast and cable company valuation in the country. So no, apples and bowling ball comparison.
It depends. At one time, radio owners had other revenue streams. Earl C. Anthony had a successful car dealership. Powel Crosley was also in the radio manufacturing business. By the end of the 90s, most of the radio owners had no other revenue streams other than on-air advertising. That's why we're in this trouble.