Three creatives max on a €20/day budget? Yeah, that's sensible. But the real kicker is making sure those three aren't just the same bloody message in different outfits.
You want genuinely different concepts. One that hits the pain point like a sledgehammer, one that shows off proof or benefit without being boring, and one that looks like it was filmed by a real human being on a Tuesday afternoon, not a production studio.
If you just swap out the visual but keep the same "our product is great" spiel, you're not learning a damn thing and you're thinning your budget faster than my patience with Meta's Business Suite. Keep them distinct or keep them at home.