Why trade for Trout when Harper would only cost you money?
Trout is the best player in the game hands down BUT you could get one of the ten best without giving up any talent at a similar AAV.
I don't see it.
Now, if Liberty would start acting like Atlanta is a large market (which it is - 2017 Census estimate had Atlanta MSA as 9th biggest in US, just behind Philly, Miami and DC and that doesn't include other nearby MSA with no ML team that is predominately Braves territory like Charlotte (#22), Nashville (#36), Raleigh (#43), Birmingham (#49), Greenville (#61), Knoxville (#64), Charleston (#74), Greensboro (#75) etc. and that assumes no market in Florida) and loosening the payroll, then sign Harper AND trade for Trout but yo have to be ready to spend on FA pitching as well which means that you're pretty quickly at a $175-$200M payroll.
But that's not going to happen.
IF the Angels decide to trade Trout (and they really should) they should be looking for high end young talent with little to no ML service time. From the Braves probably six guys from this list (Albies, Swanson, Camargo, Riley, Pache, Touki, Wright, Wilson, Newk, Soroka, Anderson, Gohara, Waters, Contreras, etc.) Let's say: Trout and Simmons for Albies, Swanson, Riley, Pache, Touki, Wright and Anderson
That would sting no doubt and put the Braves on an absolute win-now path. And it would be a huge chance to take.
Your 2019 rotation remains: Folty, Newk, Gausman, Teheran with the 5th spot being a veteran or one of Soroka, Gohara or Wilson
The pen is unaffected for 2019.
You trade Inciarte for best available to lose his salary and pick up some long term talent.
LF - Acuna
2B - Culberson
CF - Trout
1B - Freeman
3B - Camargo (if Liberty is serious about money then maybe you go Donaldson on a short contract)
RF - ? (again, if Liberty miraculously becomes run by the ghost of George Steinbrenner then maybe you make a play for Harper with opt-outs, if not then you're looking at Duvall)
SS - Simmons
C - Flowers & Suzuki again
It could be done (not likely the Harper part) and stay within the realm of realistic payroll for 2019. And, you wouldn't necessarily lose all your future. There would be a significant chance that you would be giving up at least one long term star in the deal, if not multiple long term stars.
I wouldn't do it. But, I've long pushed for patience and forecasting the window for 2020 and beyond. The Braves are competitive today, the window is open now regardless of whether now is the best time or not. So, I could see those who are more short term vision saying go for it...