Jeff Passan of ESPN believes it's more likely the Brewers and Arnold will try to build around Burnes and Woodruff than trade one of their two top-of-the-rotation starters. While this doesn't mean anything is set in stone, Passan usually has pretty good takes and is known to be pretty tightly-knit with various front offices and agents around the league.
If this is truly the case, it's hard to see the Brewers build a roster around them for $135m given their current roster commitments and pending commitments.
This means the Brewers either need to raise payroll or they need to get creative in trade. They certainly have some nice pieces on the farm to acquire good, young talent but it's hard to see them trade too much of the future in a single offseason. What I expect is more likely is that we see a few surprise non-tenders to free up cash and possibly some moves to free up additional money (Wong being an obvious example).
An interesting tidbit from a baseball journalist I generally respect and follow pretty closely.