You might be right. However, I would be counting on the Burnes/Williams/Peralta trades to bring in some bigtime players on the verge on breaking into the MLB.
I dont think its completely unrealistic where we already have Mitchell, Frelick, Contreras. Then you add in Chourio/Black/Gasser/Misiorowski and maybe 3-4 players added in trades. Clearling salary would allow for 3-4 FA signings as necessary.