But you don't get years out of the guys you're proposing when you sign them in their late twenties, at least not years at their best. You get one or two years then decline. It's a false economy.
As for the feeder club comment, I'm not sure if you are deliberately missing my point to be contrary or haven't read my posts properly but what I've said is that if you buy a clutch of younger promising players and, inevitably, some don't work out then you can recoup some of the outlay. Beyond that, of course, in the short term, without regular champions league football, a basic fact of life for clubs is that they will have to occasionally sell a player they would rather keep. Those players tend to be players either at or approaching their prime. If we only have a handful of those players then each sale under your model just ages our squad all the more. It's the quickest way to make us uncompetitive, it is not a route to success.