I'm not sure I'm following you but I'll try. With my addition, when the simulacrum wishes for a simulacrum of you, the original simulacrum is destroyed.
I'm not sure what you mean by "make a wish outside of the standard set."?
So a major restriction of wish to do anything but cast a 1-8th level spell is blowback.
With a simulacrum,
it can take it for you.
For example, you cast simulacrum. This costs you some snow and ruby dust.
It then wishes for a bag of 25,000 gp in ruby dust. It has a 1/3 chance to never be able to cast wish again; you don't care.
So the cost of simulacrum? Nullified. (Ok, you also need some snow and toenail clippings)
Want to make any other wish? Similar, first cast simulacrum, then have it wish. If you have time, cast simulcarum, wait a day, then have it cast wish to duplicate you (destroying itself, but the new copy has full spell slots). It then wishes for whatever you want, and then uses your infinite supply of ruby dust to ... create a new simulacrum of you (again, full spell slots).
So now you get consequence-free wish every 12 hours.
If you are implying that a Wish could be used to "make a simulacrum" without it simply duplicating the Simulacrum spell itself, I suppose that could be DM fiat, but since you are creating a duplicate, I wouldn't rule that Wish would work in that sense. But for people who want to interpret it that way, you could just modify it slightly:
No.
Suppose you have a use for 400,000 casts of a 8th level spell slot.
Step 1: Cast simulacrum. Generate CLONE 1
Step 2: CLONE 1 casts 8th level spell.
Step 3: CLONE 1 WISHes for a simulacrum of you. CLONE 1 destroyed, CLONE 2 created
Step 4: Goto step 2, with CLONE 2 replacing CLONE 1.
There, an infinite fountain of level 8 spells cast every 12 seconds or so.
Time required: 36 hours.
Ingredients required: Components to one casting of simulacrum.
The fundamental bottleneck is ... toenail clippings. Which you can use strategy 1 to generate an elephant-sized pile of.