Ivf over iui

Samantha
Can you choose to do ivf? I'm trying as a single mom by choice and don't want to waste my time and money doing iui. I would like to jump the bullet and go all in with ivf. I have pcos and have never really had a natural period. I only get them when I'm on birth control.  So is it possible to choose ivf over Iui? Especially when I can pay out of pocket for it.
​Thanks.