I dont think either Everton or Roma will be a feeder club, both are of similar value and have similar revenue.
Friedkin has a networth of 6.1 billion according to those who track such things. That would jump us up the rich leaderboard. He owns Gulf States Toyota that produces 8 billion in revenue each year. Friedkin pumped a lot of money into Roma for years, as they competed with Juventus to see who could lose the most money. Two years ago they lost over 200m euros, and lost 99m euros last season. It may be he wants two bites of the cherry. Of course the worry is that sounds like what Moshiri did. The pro is that unlike Moshiri he isnt poor, he actively creates massive revenue each year with his other businesses, has already laid out a plan for Roma that seems good business sense, and can continue to actively fund teams losses for as long as he pleases.