Not a lot of organizations pull a lot of talent when they're searching for 3rd stringers. Miami and the Grizzlies recently might be the two exceptions.
Grizzlies haven’t really had much success in that regard for a while though. Vince Jackson was a rotation guy for them last year who they found as an UDFA but I’m not sure how much he’s actually going to play for them with Ja, Bane, and Smart being healthy this year. All the other guys that popped for them last year were either elite prospects that fell for serious character concerns (GG Jackson) or first round pick guys who looked moderately okay (Santi and LaRavia). They also dumped most of the guys from their drafts over the last couple of seasons for peanuts because most of them turned out to kinda suck (Ziare Williams pretty much just being skinny Donte Greene, Roddy just sorta being chubby and that’s all).
The Heat are so successful in their player dev culture precisely because they have an exact player profile they go for (3 and D wings/guards) with UDFAs and use all their first round draft picks on bigs and ball handling upside swings. In that sense, the Kings have already been following this model under Monte since pretty much every single guy they’ve picked up UDFA or in the second round (aside from Neemy) has been a 3&D guy with elite perimeter numbers and huge stock counts while all their first rounders have been ballhandler upside swings (yes, even Davion) or Keegan Murray (a lights out 6’8” shooter who is also an elite defender at the very least who is pretty much impossible for the Kings to acquire outside the top of the draft). For every Max Struss or Caleb Martin the Heat have produced, there have been dozens of random other guys who have gone through “Heat Culture” and not panned out.