I've always doubted how realistic that was/is. The only remote possibility I can see is that somehow we manage to do what Man Utd did in the early 90s and produce a freakish clutch of players in one go that will bring quick success and make up half the first team for 10 or more years. We've brought some great players through but unless they all come through together they just get picked off one by one. Walcott had left before Bale played, Bale had left before Oxlade-Chamberlain, who'd left before Shaw played and Shaw has left before whoever the next one is.
It's realistic because it's happening
Because we have wealthy owners it's easy to forget that our transfer budget for our championship promotion push was funded by the sale of the Ox. I can't be bothered to check with any research but i'm pretty sure all our league one signings also amounted to the one sale of Chamberlain.
We essentially constructed a squad capable of back to back promotions on the sale of one player.
Since our return to the premier league we've spent around £60m - Three players sold and we've nearly recouped that investment.
Now we have the biggest managerial appointment in the clubs history with the biggest budget in the clubs history looking to take us up to the next level. Perhaps it would have been better to be sitting on a smaller budget but our team still together, but I see no reason why the club cannot continue to grow.