Machado and Xander come to about $60 million a year for the next 11 years. Yu is another $18 million per year for the next 6. Basically, Soto is going to require only another $8-15 million annual commitment for 13-15 years over the current commitment to make him the 3rd horse in the lineup for the next decade. I don't see that as unaffordable. The rotation is a bit short, but that's going to be fillable, perhaps not at the Snell/musgrove level
Edit- I missed the Musgrove extension. Having Yu and Musgrove for < $40 million gives them flexibilty.