It's extremely possible! Easier than finding quality starters, even. The Phillies just haven't figured it out. But the teams who have thrived these past few years have, and usually on the cheap too, because young arms and fringe arms can still get the job done in limited, extremely targeted usage just as well as $10 million guys. And we saw so many bullpen games in the postseason itself - but you have to get there first.
Statistically speaking Morton was the Rays 5th starter last year. He missed a few weeks with an injury, that's always going to be a concern obviously. His playoff track record is certainly something else (but again, have to get there).
The shortstop question is still part of the same single, multi-pronged question. With or without a new GM, what sort of budget and goal for the 2021 season has Middleton truly set? And $-wise, we not only need to know what they are spending, but how JT fits in. I don't see it being like two years ago when they piled up transactions (including JT himself) long before Harper signed. If they are waiting on JT, we'll be watching certain players (shortstops, DHs) go to other teams. The question is can they afford to miss out on another catcher while they're waiting.
I think Theo wants to start an ownership group, not just be handed equity from an existing controlling owner. That could be a group buying a team, or waiting for expansion. Unlike the Phillies (or now the Mets) most ownership groups these days have 10, 20 even 50 investors, with the person at the top not holding anywhere near a majority, just the power of being the founder and managing partner (much like Giles back in the day). Theo still can't be that first guy, you do need more personal wealth than that, but he would be the Jeter to somebody's Bruce Sherman (Sherman owns 46% of the Marlins, Jeter 4%).
Either way, the Phillies can't offer him enough I don't think. Plus I believe he really will take a year off