Concerns with this are:
1. 'Buying up legitimate arms' - Per FG, the top 3 projected fWAR guys (and 7 of the top 10) are off the board already. You've got Suarez, Harvey, and Fairbanks, and after that you're real quickly getting into Justin Wilson/Drew Pomeranz (projected contract: 1 year, $4m)/Caleb Thielbar territory. And at that point, then you're just in pitch lab mode. Could they pitch lab it to a top 5 bullpen? Maybe, I guess. But that's development, not money.
2. The Cubs ended up 17th in rotation fWAR last year. And that's with Boyd, Horton, Shota, and Taillon making 101 of those starts (and combining for 7.6 fWAR). Rea gave you 27 starts and 1.6 fWAR, and the rest of the team gave you 34 starts and (roughly) 1.1 fWAR. For simplicities sake, let's just replace Rea's workload with Michael King. He's projected for 29 starts and a 2.8 fWAR. As far as I can tell, the other 4 are staying in the rotation. The 30-35 starts by your 6-10 SPs, I'll be generous and say that with Steele (a somewhat proven commodity) and Wiggins (very much not the case), we can make that 1.5 fWAR. So with this plan, we're talking about adding, rounding up, 2 wins to the rotation? Move from 17th to 11th? Couple that with a step down from Tucker to the kids, and you're, 'best case' scenario, treading water? Treading water on a 92 win team is far from the worst thing in the world, but
And just to avoid the conversation of mixing prior year results with 2026 projections, projections show improvement from Shota and Taillon, and show regression from Boyd and Horton. It roughly balances out.