That's the point, you can't, or at least you're unlikely to.
30m gets you a Beto type of player. If he's called Beto or whatever else, he's still gonna be incredibly frustrating. Why sell Beto to get a different flavour of Beto, exactly?
The insanity is you yourself are seeing that 30m in the current market are 1 Beto-type of player, and are adamant that it'll somehow turn out better for the same money. That's a 1 in 500 chance at best - take 5 min to look up transfers from the last 3 years, sort by strikers, see who's performed how.
Moyes himself spent 30m on Fullkrug, who's barely played and barely scored. Why would/should we do that? A like for like for 30 mil, brilliant plan mate.
That's not a sellable asset. Now add to it the fact we have literally no other striker - how does that keep him as a sellable asset currently?
Also, now "it's a big old world out there" and we should aim for better, but when I suggested there are better managers than Dyche in the same big old world out there and we should try for a better one it somehow wasn't true?