Yeah, I had seen that. Whatever. I think you can get them with thirty spinels.
Didn't get a chance to try Mercs yet since I'm at the end of my S+ run. I just used my last save right before the last Krauser fight. So I gotta go to the end from that point with no saves, and I think it's doable. Once you get out of the 5-4 section, you can coast more or less. I have about 45 minutes left of time to complete and that's plenty. I was worried I wouldn't have enough treasure money for the strat that Bawkbasoup uses. He bought an RPG for both Krauser and Saddler and I have just shy of enough to buy two RPGs with just treasure and Primal knife money so I won't even need to resell weapons right before Saddler. I'll get back the Primal by rebuying it my next run. It's free 25k.
I can confirm that the door skip works on PS4.
I kept turning right trying to do it, but you gotta go left since the camera is already pointed that way due to how the camera holds on Leon's back. The object is to turn around as quick as possible. I was going to use my last save right there before, but I figured I had about five minutes of gametime to see if I can do it, and I swear I got it on the third or fourth try. It's not hard at all and it's probably the easier door to do it on since there's so many clips of that one in particular. This skips so much toxic area bullshit. I've gone through the third act of Castle and entirety of Island up to this point with next to fucking nothing. I had only one golden egg for Salazar since I stupidly sold it so I only had the one from the throne room. After I hit him with it I had only one magnum round and I had to beat him legit after. Since I did that skip, the elevator area had a shitload of resources since there's like six boxes.
I'll probably get S+ tonight or tomorrow. Then I'm going to do an unlimited hand cannon pro run and get some achievements like all treasures in one playthrough etc. You get the cat ears accessory that gives unlimited ammo for S+.