Just for the sake of statistics, I am giving the results of 160 N Gacha ticket pulls. I always selected the same slot (bottom center) unless a Step Up 5 was present, in which case I used a Card Reveal to get the SR.

Of the 160 Gacha pulls,
33 were R
9 were SR (with Card Reveal)
2 SRs were missed (due to non-CR use)

On a percentage basis, 20.6% were R, 5.6% were SR, with a potential 6.9% being SR.

Thus, with 150,000 pero of N Gacha tickets, you could expect 20-21 R levels and 7 SR levels (w/ card reveals, 1 without).

Assuming 20 R levels and 80 N levels, to get the same with just purchasing N wilds would require 300,000 pero. You also have no chance of getting an SR level.

So getting Gacha tickets ends up being about twice as pero effective as getting N wilds overall.