He would be given money and any team with Messi is salvageable.
Just would be a massive contradiction after he said he would never manage them due to his past with Espanyol and would show he’s no difference to any other person in football
Just imagine the amount of money necessary to replace Messi, Suarez, Pique, Alba, Busquets and Vidal while also addressing some of the rickitier parts of the team (i.e. Umtiti, and apparently Semedo as he;s perennially linked with other clubs)
That would require a Guardiolan amount of money to be thrown at the team in a remarkably short space of time, especially in Barca's case because the amounts they've paid for Suarez, Dembele, Coutinho and Griezmann in the past has inflated what clubs expect to be paid for players, for example the kid they paid Braga €31m for in January or the €60m + Arthur they had to send Juve's way for Pjanic recently
And that's the thing with Poch: at Espanyol and Southampton he worked with budgets somewhere between meagre and modest, and at Spurs he did have a more generous budget but he didn't have the pressure of getting an immediate RoI from spending that money that he would at Barca, and that's a very different atmosphere
The best comparison is what's happening in Hollywood these days, as they have effectively killed the mid-budget movie so directors go from working on films with a budget of $10m or less to working on one with a budget of $150m overnight, which isn't an exaggeration as that's exactly what happened to Josh Trank when he went from directing Chronicle to directing Fantastic Four which had at least ten times the budget and infinitely more pressure upon the film and him to succeed