We'd have to totally gut our team to get both George and Cousins, though it would likely be worth it. We'd need to outbid various other teams, like the Lakers and maybe the Wolves etc.
IMO to get two superstars of that caliber it would cost us:
2017 Brk pick
2018 Brk pick
Memphis Pick
Clips Pick
Brown
Smart
Rozier
Crowder
Bradley
Olynyk
+ salaries (Amir, JJ, Zeller) to make the trades work.
If we're lucky we have IT left over, and have 4 all-stars (Horford, IT, Cousins, George) in the starting lineup.
We'd be a contender for many years, despite an extremely thin bench.
But as we saw in 2008, getting those top players is more important than having a deep bench.